Name: Cheesy Pumpkin Pasta Bake with Mushrooms, Spinach, and Walnut-Sage Topping Recipe
Prep time: 20 min
Cook time: 30 min
Total time: 50 min
Cuisine: American
Ingredients: 1 lb. dry pasta of choice (such as mezzi rigatoni, shells, ziti, fusilli, or farfalle); 2 Tbsp. butter; 1/2 cup finely chopped walnuts; 2 Tbsp. finely chopped fresh sage leaves; Remaining 1 cup fontina cheese, grated (divided as 1/2 cup in sauce, 1 cup for topping); 2 Tbsp. extra-virgin olive oil; 8 oz. cremini (baby bella) mushrooms, sliced; 1 yellow onion, finely chopped; 1/4 cup tomato paste; 4 garlic cloves, minced; 1/2 tsp. crushed red pepper flakes; 3 to 4 handfuls fresh baby spinach; 1 tsp. dried oregano; 1 tsp. kosher salt; 1/2 tsp. black pepper; 1/4 tsp. ground nutmeg; 3 cups vegetable broth; 1 (15-oz.) can pumpkin purée; 1/2 cup grated Parmesan cheese

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If you’re on the hunt for a cozy, crowd-pleasing meal that combines comforting flavors with a burst of seasonal goodness, this Cheesy Pumpkin Pasta Bake with Mushrooms, Spinach, and Walnut-Sage Topping Recipe will quickly become your new favorite. Imagine tender pasta bathed in a creamy pumpkin tomato sauce, earthy mushrooms and fresh spinach folded in, all perfectly baked under a golden, buttery walnut-sage crust. It’s the ideal dish to brighten up chilly evenings and sneak in some healthy veggies without sacrificing any of the indulgence.

Ingredients You’ll Need

Several small white bowls and one can are arranged on a white marbled surface, each filled with different colorful ingredients. At the center, a small wooden bowl holds chopped walnuts, and above it, a white bowl has dried green herbs. To the right, two yellow bowls contain chopped white onions and sliced brown mushrooms. Below them, a white bowl is full of uncooked rigatoni pasta, and beside it, a black bowl holds shredded mozzarella cheese. A white bowl with fresh green spinach leaves is near the pasta. There's a small brown bowl with bright red tomato paste and a small white bowl with minced garlic. A partially open can of orange pumpkin puree sits in the bottom left corner. The colors and textures vary from leafy greens, smooth pastes, crunchy nuts, and firm pasta, all well organized. Photo taken with an iphone --ar 4:5 --v 7

Gathering simple, quality ingredients is the secret to making your Cheesy Pumpkin Pasta Bake with Mushrooms, Spinach, and Walnut-Sage Topping Recipe truly shine. Each item plays a special role in building layers of flavor, balancing creamy, savory, and nutty notes while adding texture and color that makes the dish as beautiful as it is delicious.

Pasta (1 lb.): Use mezzi rigatoni, shells, ziti, fusilli, or farfalle for perfect sauce capture in every bite.

Butter (2 Tbsp.): Adds rich creaminess and helps toast the walnuts and sage to aromatic perfection.
Walnuts (1/2 cup, finely chopped): Provides a satisfying crunch and deep nuttiness in the topping.
Fresh sage leaves (2 Tbsp., finely chopped): Offers a fragrant, savory lift paired beautifully with the walnuts.

Extra-virgin olive oil (2 Tbsp.): Used to sauté vegetables gently while enhancing their flavors.
Cremini mushrooms (8 oz., sliced): Brings an earthy, meaty texture to the sauce.
Yellow onion (1, finely chopped): Sweetness and depth start here, building a flavorful base.

Tomato paste (1/4 cup): Concentrated umami that adds color and richness to the pumpkin sauce.
Garlic cloves (4, minced): Infuses the bake with savory warmth.
Crushed red pepper flakes (1/2 tsp.): Offers a subtle, gentle kick to balance the creaminess.

Fresh baby spinach (3 to 4 handfuls): Brings freshness and vibrant green color to the mix.
Dried oregano (1 tsp.): Adds an herbal note that complements the tomato and pumpkin.
Kosher salt (1 tsp.) and black pepper (1/2 tsp.): Essential seasoning that elevates every ingredient.

Ground nutmeg (1/4 tsp.): A delicate warmth that pairs beautifully with pumpkin.
Vegetable broth (3 cups): Creates a luscious sauce base with savory depth.
Pumpkin purée (1 15-oz. can): Brings creamy body and subtle sweetness central to the bake.

Parmesan cheese (1/2 cup, grated): Adds sharp, salty notes that enhance the sauce.
Fontina cheese (1 1/2 cups, divided, grated): Melts beautifully, lending gooey, rich texture to both sauce and topping.

How to Make Cheesy Pumpkin Pasta Bake with Mushrooms, Spinach, and Walnut-Sage Topping Recipe

Step 1: Preheat and Cook Pasta

Start by preheating your oven to 375ºF. Bring a large pot of generously salted water to a boil, then add your pasta and cook it until it’s just shy of al dente—about two minutes less than directed on the package. This ensures the pasta finishes cooking perfectly in the oven, soaking up the sauce without becoming mushy. Drain the pasta and set it aside while we prepare the sauce.

Step 2: Toast the Walnut-Sage Topping

In a large sauté pan over medium heat, melt 2 tablespoons of butter. Once bubbling, add your finely chopped walnuts and fresh sage leaves. Toast these gently for about 5 minutes, stirring occasionally until the walnuts are golden and fragrant. A light pinch of salt highlights their flavor. Transfer this delicious mixture to a bowl—this will become the irresistible crunchy topping.

Step 3: Sauté Mushrooms and Onion

Return the pan to medium heat and add the olive oil. Toss in the sliced cremini mushrooms and finely chopped onion. Cook this until the veggies have softened and started to caramelize, about 7 to 8 minutes. This process builds a savory, deep flavor base to complement the pumpkin.

Step 4: Build the Pumpkin Tomato Sauce

Stir in tomato paste, minced garlic, and crushed red pepper flakes. Let them cook for 2 to 3 minutes until the tomato paste deepens to a brick red and the garlic releases its aroma. Gradually add fresh spinach, stirring as it wilts completely. Then season with oregano, salt, pepper, and a hint of ground nutmeg for necessary warmth. Pour in the vegetable broth, scraping up any flavorful browned bits from the pan, and stir to combine the sauce foundation.

Step 5: Add Pumpkin, Cheeses, and Pasta

Now is the moment to fold in your pumpkin purée, grated Parmesan, and half of the fontina cheese. Stir gently until the fontina melts and the sauce is silky smooth. Add the cooked pasta and toss well, ensuring every piece is luxuriously coated in this creamy, comforting sauce.

Step 6: Assemble and Bake

Transfer the pasta and sauce mixture into a greased 13×9-inch baking dish. Sprinkle the remaining fontina cheese evenly on top, then scatter your toasted walnut-sage topping for a beautiful, buttery crunch. Cover loosely with foil and bake for 15 minutes. Remove the foil and continue baking for another 10 to 15 minutes until the cheese is bubbling and golden brown on top.

How to Serve Cheesy Pumpkin Pasta Bake with Mushrooms, Spinach, and Walnut-Sage Topping Recipe

The image shows a cooking pan with two different views side by side. On the left side, the pan has a base layer of cooked food that is brownish with sliced mushrooms and some small pieces, topped with a thick layer of fresh, bright green spinach leaves covering most of the pan. On the right side, the spinach is cooked down, mixing with the brownish base layer that includes mushrooms and small diced vegetables, showing a mix of dark green and brown colors with a soft texture. The pan sits on a white marbled surface. Photo taken with an iphone --ar 4:5 --v 7

Garnishes

To elevate your Cheesy Pumpkin Pasta Bake with Mushrooms, Spinach, and Walnut-Sage Topping Recipe, sprinkle a handful of fresh sage leaves or chopped parsley just before serving. A drizzle of high-quality extra-virgin olive oil can add a luscious shine and enhance the earthiness of the bake. If you love a bit of zest, a sprinkle of lemon zest brightens each bite wonderfully.

Side Dishes

This pasta bake is hearty, but pairing it with a crisp green salad with a tangy vinaigrette balances the richness beautifully. Roasted root vegetables or garlic bread make excellent companions, adding texture and flair to your meal while keeping the fall flavors front and center.

Creative Ways to Present

For a special dinner, serve your bake in individual ramekins topped with the walnut-sage topping for charming personal portions. Alternatively, add extra color and texture by finishing with toasted pumpkin seeds or a sprinkle of chili flakes. These small touches can easily impress guests and make the dish feel festive.

Make Ahead and Storage

Storing Leftovers

After enjoying your meal, simply cover any leftovers tightly with plastic wrap or transfer to an airtight container and refrigerate for up to 3 days. The flavors actually deepen overnight, making the next day’s meal just as delightful.

Freezing

If you want to save some for longer, this Cheesy Pumpkin Pasta Bake with Mushrooms, Spinach, and Walnut-Sage Topping Recipe freezes beautifully. Freeze in portions within airtight containers or freezer bags for up to 2 months. Remember to thaw in the fridge overnight before reheating for the best texture.

Reheating

Reheat leftovers in the oven at 350ºF, covered with foil to prevent drying, for about 20 minutes or until warmed throughout. Alternatively, a microwave works well for quick reheats, just stir halfway for even warming and sprinkle a little water on top to keep the sauce creamy.

FAQs

Can I use a different type of squash instead of pumpkin purée?

Absolutely! Butternut squash or kabocha squash purée can be great substitutes. They offer similar sweetness and creaminess, making your pasta bake just as delicious with a slightly different flavor profile.

Is this recipe suitable for vegetarians?

Yes, this entire Cheesy Pumpkin Pasta Bake with Mushrooms, Spinach, and Walnut-Sage Topping Recipe is vegetarian-friendly, using vegetable broth and cheeses without animal rennet. Just be sure to check your cheese labels if strict vegetarianism is a concern.

Can I make this recipe vegan?

To veganize the bake, substitute butter with vegan margarine, use a plant-based milk and cheese alternative, and ensure the vegetable broth is vegan. The walnut-sage topping works beautifully as is and keeps the delightful crunch.

What type of pasta works best in this recipe?

Tubular or shaped pastas like mezzi rigatoni, shells, ziti, fusilli, or farfalle work best because they hold the creamy sauce well, offering a perfect bite each time. Avoid thin spaghetti or angel hair, as they may get lost in the bake.

Can I prepare the bake completely ahead of time before baking?

Yes! After assembling, you can cover and refrigerate the entire dish up to 24 hours before baking. This makes it a wonderful option for guests or busy weeknights, baking straight from the fridge—just add a few extra minutes to your baking time.

Final Thoughts

This Cheesy Pumpkin Pasta Bake with Mushrooms, Spinach, and Walnut-Sage Topping Recipe is truly a celebration of fall flavors wrapped in a comforting, cheesy hug. It’s the kind of dish that warms the soul and brings people together around the table. I wholeheartedly encourage you to try it soon—once you do, it might just become your go-to recipe for cozy nights and happy gatherings.