Preheat your oven to 375°F (190°C). Yes, the oven is your best friend here. Give it a認 quick kiss of heat and it’ll do the heavy lifting.
In a bowl, mix ground meat, breadcrumbs, parmesan, egg, garlic, parsley, oregano, salt, and pepper. Stir until just combined—no overmixing; we’re not making hockey pucks here.
Shape the mixture into small meatballs, about 1 inch each. Space them on a lined baking sheet. Drizzle with olive oil.
Bake meatballs for 12–15 minutes until they’re browned and set. They don’t need to be opaque to the very center; they’ll finish in the sauce.
Spread marinara in a casserole dish. Nestle the baked meatballs into the sauce. Spoon a little extra sauce over the top if you like.
Sprinkle mozzarella and remaining parmesan over the dish. Bake for 15–20 minutes until cheese is melted and bubbly.
Garnish with fresh basil or parsley if you’re feeling fancy. Let it rest a couple of minutes, then dig in with crusty bread or a simple salad.