Kebabs:

1 kg (2 lb 3 oz) minced (ground) beef or lamb (15–20% fat)

1 small brown onion, grated

1 tbsp freshly minced garlic

1 tbsp ground cumin

1 tbsp ground coriander

1 tbsp sweet paprika

1 tsp chilli flakes (optional)

2 tsp sea salt flakes

¼ tsp freshly cracked black pepper

3 tbsp finely chopped flat-leaf parsley

½ tsp bicarbonate of soda (baking soda)

2 tbsp olive oil, for brushing

Sumac Onions:

1 small red onion, finely sliced

1½ tsp sumac

Juice of ½ lemon

1 tsp olive oil

¼ tsp sea salt flakes

Yoghurt Garlic Sauce:

1¼ cups (310 g) Greek yoghurt

½ tsp freshly minced garlic

1½ tbsp lemon juice

½ tsp sea salt flakes

To Serve:

4–6 flatbreads or pita (omit for gluten-free)

2 large tomatoes, sliced into wedges

½ cup (15 g) finely chopped flat-leaf parsley