Preheat the oven to 400°F (200°C) and line a baking sheet with parchment paper or grease it with olive oil.

Sauté the onion and garlic in a skillet over medium heat until softened, about 5 minutes.

In a large bowl, combine ground meat, sautéed onion and garlic, bread crumbs, egg, feta cheese, parsley, oregano, mint, salt, and pepper. Mix gently until combined.

Form the mixture into golf ball-sized meatballs using wet hands and place them on the baking sheet.

Bake for 20-25 minutes until golden brown and cooked through.

Let cool slightly before serving. Enjoy with tzatziki sauce or in pita wraps.