Low Carb 3-Ingredient Meatball Bakes
1 24-ounce jar low-sugar marinara or pizza sauce
1 24-ounce bag frozen fully cooked beef meatballs (about 24–30 small meatballs)
2 cups shredded whole-milk mozzarella cheese
Preheat your oven to 375°F (190°C). Lightly grease a medium ceramic casserole dish (about 9×9 inches or similar size).
Pour about 1 cup of the marinara or pizza sauce into the bottom of the casserole dish and spread it into an even layer.
Arrange the frozen fully cooked beef meatballs in a single, snug layer over the sauce. It’s fine if they touch; just try to keep them in one even layer so they bake evenly.
Spoon the remaining sauce over the tops of the meatballs, making sure each one gets at least a little sauce so they stay moist and soak up flavor.
Sprinkle the shredded mozzarella cheese evenly over the sauced meatballs, covering them from edge to edge. This is what gives you that gooey, browned top that feels like takeout.
Place the casserole dish on the middle rack of the preheated oven and bake for 25–30 minutes, or until the sauce is bubbling, the cheese is fully melted, and the edges are golden brown.
If you like a deeper brown top, switch the oven to broil for 1–3 minutes at the end, watching very closely so the cheese browns without burning.