Grilled Turkish Kofta Kebabs

Ingredients

• bamboo You will need long 6 skewers, preferably flat, 12 inches or more or 12 shorter ones. If you use, skewers, soak them in water fi…
• 1 1/4 cups plain greek yogurt
• 1 tablespoon lemon juice
• 1 garlic clove small, pressed or finely minced
• 1 1/2 tablespoons olive oil
• 1 tablespoon sumac plus more for the meat and vegetables
• 1/2 teaspoon salt
• 2 pounds ground lamb or beef
• 1 small yellow onion peeled and grated, blotted with towel to soak up excess liquid
• 1 bunch flat leaf parsley just the leaves, divided
• 3 tablespoons pepper Urfa
• 1 tablespoon sumac divided
• 1 1/2 teaspoons kosher salt
• 2 tomatoes ripe, sliced in half through the core, each half sliced thinly
• 1 English cucumber washed and thinly sliced, crosswise
• 1 red onion peeled, slivered, soaked in cold water for 10 minutes, drained
• parsley leaves about 1½ cups or whatever's left of the bunch
• 18 romaine lettuce leaves depending on size, washed
• 6 pitas sliced in half, warmed