Heat oven to 375°F. Lightly oil a 9x13-inch baking dish.
Whisk sauce, water, Italian seasoning, garlic powder, onion powder, red pepper flakes, salt, and pepper in a bowl.
Scatter dry pasta and frozen meatballs into the prepared dish. Pour the seasoned sauce over and stir to coat evenly.
Cover tightly with foil and bake for 30 minutes.
Remove foil, stir well, then dollop ricotta over the top. Sprinkle with mozzarella and Parmesan.
Bake uncovered 12 to 18 minutes, until pasta is tender and cheese is bubbly and lightly golden. Broil 1 to 2 minutes if you like extra color.
Rest 5 minutes, then garnish with parsley. Taste and adjust salt and pepper before serving.
Notes
Variation: Swap in turkey meatballs or use arrabbiata sauce for a spicier bake. Add a handful of baby spinach or sliced bell peppers under the cheese for extra veggies.Storage: Refrigerate leftovers in an airtight container for up to 4 days, or freeze up to 2 months. Reheat covered with a splash of broth to loosen the sauce.This recipe is an original creation inspired by classic Easy Meatball Casserole Recipe flavors. All ingredient ratios and instructions are independently developed.