Bring the tomatoes, 2 tablespoons of oil, tomato paste, a few dashes of lemon juice, salt, pepper and sumac to the boil. Chop the parsley and stir in. Take the saucepan off the hob and add the bulgur. Let it steep for 15 minutes.
Dice the peppers very small, cut the spring onions into rings, cut the peppers into very fine rings. Add the vegetables to the bulgur and season to taste.
Mix the yoghurt with the sour cream, add 1 tablespoon of oil, salt and pepper, as well as a few dashes of lemon juice. Press and fold in the garlic cloves.
Pluck lettuce leaves and place bulgur on top. Serve the bulgur with the yogurt dip.