Preheat your oven to 425°F (220°C). Grab a 9x13-inch baking dish—you’re not gonna need a skillet today!
Dump the dry pasta straight into the baking dish. No need to boil it. Seriously.
Pour in the marinara sauce and water. Give it a stir so the pasta’s all coated and swimming happily.
Toss in the frozen meatballs. Just scatter them like confetti. We’re not aiming for perfection here.
Cover the whole thing tightly with foil and bake for 35 minutes. Put your feet up.
Remove the foil, sprinkle mozzarella and Parmesan on top, and bake uncovered for another 10-15 minutes. The cheese should be bubbly and golden. Yum.
Let it rest for 5 minutes before serving. Then dig in like you’ve earned it (because you have).