1. Preheat your oven to 375°F (190°C) and grease a large baking dish with cooking spray or olive oil.
2. In a large skillet, heat a small amount of olive oil over medium heat. Add the diced onion and garlic, sautéing for 2-3 minutes until fragrant and softened.
3. Add the ground beef to the skillet, breaking it apart with a spoon. Cook until browned and fully co
