Best Gyro Sandwich Recipe - How To Make Gyro Sandwiches

Ingredients

• 1 small yellow onion, roughly chopped
• 5 cloves garlic, 3 minced, 2 left whole
• 1 tsp. fresh oregano leaves or 2 tsp. dried oregano
• Kosher salt
• Freshly ground black pepper
• 2 lb. ground lamb
• 2 c. (16 oz.) whole milk plain Greek yogurt
• 1 English cucumber, grated on a box grater
• 2 tbsp. chopped dill or mint
• Flatbreads or pitas, warmed, for serving
• Sliced tomatoes, for serving
• Chopped romaine lettuce, for serving
• Thinly sliced red or yellow onion, for serving