Preheat the oven to 220C, fan-forced. Line a large oven tray with baking paper. Thinly slice half the onion into rounds, then separate into rings. Finely chop the remaining onion. Crush or finely chop the garlic.
Step 2 — Pickle onion
Combine ½ tsp sumac, 2 tsp red wine vinegar and 1 tsp honey in a bowl. Add the sliced onion and toss to coat. Set aside to pickle, tossing occasionally, until needed.
Step 3 — Make lamb topping
Using hands, combine the lamb mince, Turkish seasoning, tomato paste, chopped onion, garlic and ½ tsp sumac* in a large bowl. Season with salt and pepper.
Step 4 — Bake pita
Put 2 pita* on the lined tray and spread with the lamb topping. Bake the pita for 12 mins or until golden and crisp (see cooking tip).
Step 5 — Make tomato salad
Meanwhile, cut the tomatoes into thin wedges. Combine 2 tsp red wine vinegar and 2 tsp extra virgin olive oil in a large bowl and season with salt and pepper. Add the tomato and salad leaves and toss to combine.
Step 6 — Get ready to serve
Cut the pita into slices. Divide the lamb pita among plates and drizzle with the ranch dressing. Serve with the sumac onions and tomato salad.