Preheat oven to 400°F (200°C). Place flatbread or split pita on a baking sheet and toast for 3-5 minutes until edges turn golden and crisp. Watch closely after 3 minutes to avoid burning.
4 pieces Turkish flatbread or pita
Heat olive oil in a small saucepan over medium heat. Add minced garlic if using and cook 1 minute until fragrant. Pour in tomato sauce, stir, and simmer for 10 minutes until thickened and coating the back of a spoon.
1 cup tomato sauce, 2 cloves garlic, 1 tbsp olive oil
In a separate small pan, melt butter over medium-low heat. Cook 3-4 minutes, swirling occasionally, until it turns light brown and smells nutty. Remove from heat immediately to prevent burning.
4 tbsp butter
Heat a skillet over medium heat. Add meat slices in a single layer and warm for 1-2 minutes per side until heated through and edges brown slightly. Work in batches to avoid overcrowding.
1 lb lamb or beef doner meat
Place toasted bread on serving plates. Layer warm meat slices on top. Pour hot tomato sauce over the meat, then drizzle browned butter over everything. Dollop cold yogurt on the side or gently fold into the sauce off heat. Garnish with sliced tomatoes, green peppers, and sumac if using. Serve immediately while bread is still crisp.
1 lb lamb or beef doner meat, 4 pieces Turkish flatbread or pita, 1 cup tomato sauce, 4 tbsp butter, 1 cup full-fat plain yogurt, 2 green peppers, 2 tomatoes, 1 tsp sumac
