Beef Doner Kebabs

Ingredients

• 1 pound Ground Beef (85% lean or leaner)
• 1/2 small onion, quartered
• 1/4 cup Greek-style yogurt
• 1 tablespoon olive oil
• 2 teaspoons garlic
• 2 teaspoons Kosher salt
• 2 teaspoons Greek seasoning
• 2 teaspoons tomato paste
• 1 teaspoon ground black pepper
• 1/4 teaspoon ground sumac
• 1/4 teaspoon ground cloves
• 1/4 teaspoon cayenne pepper
• 1 tablespoon chopped fresh parsley
• 4 naan or pita flatbreads (about 8-inch diameter)

Creamy Yogurt Sauce:

• 1/2 cup Greek-style yogurt
• 1/4 cup fresh lemon juice
• 1 jalapeno pepper, seeds removed and finely chopped
• 2 tablespoons olive oil
• 1 tablespoon chopped fresh parsley
• 1/2 teaspoon ground sumac
• 1/4 teaspoon Kosher salt

• Lettuce leaves, pepperoncini, feta cheese, sliced tomatoes, cucumbers and sliced red onion (optional)