Mediterranean Turkey Meatball Gyros with Creamy Tzatziki

Ingredients

• 2 tablespoons olive oil
• ¼ teaspoon ground black pepper
• ½ teaspoon garlic powder
• 2 garlic cloves, minced
• ¼ cup red onion, finely diced
• 1 lb ground turkey
• ¼ cup cucumber, grated and well-drained
• ¼ teaspoon salt
• 4 whole wheat flatbreads
• ½ cup red onion, thinly sliced
• 1 cup cucumber, diced
• 1 cup tomato, diced
• ½ teaspoon salt
• ½ cup plain Greek yogurt
• 2 tablespoons lemon juice
• 1 teaspoon dried oregano
• ½ teaspoon dried dill
• 1 cup fresh spinach, chopped