1. Preheat the oven to 425°F. On a baking sheet, toss the sweet potatoes with 2 tablespoons olive oil, salt, and pepper. Roast 20 minutes, until crisp and tender.2. In a large skillet, combine the ground meat and shallots. Cook over medium heat, breaking up the meat as it cooks, until browned, about 5 minutes. Add 2 tablespoons of olive oil, garlic, paprika, cumin, turmeric, salt, and chili flakes. Pour over 1/2 cup water. Cook for 2–5 minutes, until the water has cooked out.3. Meanwhile, make the yogurt sauce. Mix everything in a bowl and season with salt.4. Arrange the warm pitas in bowls. Spoon over some rice, add a couple spoonfuls of meat, and top with the roasted sweet potatoes. Add pickled red onions, lettuce, and fresh herbs. Drizzle with the yogurt sauce and serve.