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Dump-and-Bake Meatball Casserole

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Because we’re tired, but we still want to eat like queens.

Let me tell you something: this casserole saved dinner more times than I care to admit. I keep a bag of frozen meatballs in my freezer the way other folks keep emergency candles—because you just never know.

I stumbled into this recipe on a weeknight that had chaos written all over it. Work had run late, the dog tracked muddy pawprints through the kitchen, and the only thing I had going for me was a clean casserole dish and a jar of marinara sauce. I looked at that pasta box and thought, You’re going in raw. We’re all going in raw tonight.

Thirty-five minutes later, I pulled a bubbling, cheesy miracle from the oven and sat down with a bowl that felt like a warm hug—and not the weird aunt hug, either. A real one. From someone who brings garlic bread and knows you’ve had a long day.

This meal? It’s pure comfort in a casserole dish. No boiling. No chopping. No guilt.

What Makes This So Good?

I mean—besides the cheese? Here’s the magic:

  • Minimal effort, maximum flavor. You throw it all in the dish and bake it. That’s it. No pots, no pans, no standing at the stove.

  • It’s cozy and nostalgic. Feels like something your grandma might’ve made in the ‘90s—if she’d had Pinterest.

  • Picky eaters love it. Even the ones who “don’t like sauce” somehow manage to clean their plates.

  • Feeds a crowd. Or a family. Or just you, for three and a half days.

  • It’s one of those “back-pocket” recipes—reliable, easy to memorize, and flexible if your pantry’s looking bare.

Ingredients That Love You Back

Let’s go through what you’ll need—and what you can swap if you’re wingin’ it like I usually am.

  • Pasta (16 oz cavatappi): I love cavatappi because it’s fun to say and fun to eat. But truly? Any short pasta will work. Penne, rotini, elbows—they’ll all soak up that sauce just fine.

  • Marinara sauce (25 oz jar): Grab your favorite. I use whatever’s on sale or halfway decent from Costco. If you’ve got some homemade stuff in a jar? Even better.

  • Water (3 cups): Seems dull, but it’s the secret to no-boil magic. Don’t skimp.

  • Frozen meatballs (14 oz bag): Beef, turkey, chicken, veggie—dealer’s choice. No thawing. No judgment.

  • Mozzarella cheese (1½ cups): Because we’re not making diet food here. Pre-shredded is fine. Fresh is divine. I use whatever’s within reach.

  • Parmesan cheese (½ cup): Adds that sharp, salty finish. A little sprinkle goes a long way.

Optional bonuses:

  • A handful of baby spinach? Stir it right in.

  • Half a bell pepper? Dice it and toss it on top.

  • A lonely zucchini? Grate it and mix it in. No one will know.

How To Actually Make This (Spoiler: You Already Can)

Here’s the “dump” part:

  1. Preheat oven to 425°F. Crank it up. This dish likes heat.

  2. Grab your 9×13 dish and pour in your uncooked pasta. (Don’t rinse it, don’t overthink it.)

  3. Add the marinara, water, and frozen meatballs. Stir it like you mean it. Make sure most of the pasta’s covered in liquid—doesn’t have to be perfect.

  4. Cover the whole thing tightly with foil. Tight is key. Loose foil = sad, crunchy noodles.

  5. Bake for 35 minutes. Go sit down. Take your bra off. You’ve earned it.

  6. Uncover, stir, and check the noodles. Are they still chewy? Give it 5–10 more minutes covered. Don’t worry—it’s forgiving.

  7. Sprinkle mozzarella and parmesan over the top. Uncovered, back into the oven for 5–10 minutes until bubbly and golden in spots.

  8. Let it sit for 5 minutes before serving. This part’s hard but worth it. You want it thick and saucy—not a lava spill.

Variations & “Ooh Let’s Try That”

Once you’ve made it once, you’ll start riffing. That’s how it goes. Here are a few things I’ve tried and loved:

  • Add a layer of ricotta before the cheese topping. Now it’s lazy lasagna.

  • Toss in red pepper flakes for a little zip.

  • Use Alfredo instead of marinara for a creamy twist. Add spinach and call it fancy.

  • Breadcrumb topping? Mix panko with melted butter and garlic powder. Sprinkle it on top with the cheese. Toasty, crunchy heaven.

  • No meatballs? Use cooked sausage coins, leftover rotisserie chicken, or skip the meat entirely. Cheese is the star anyway.

What About Leftovers?

Oh honey, leftovers are glorious.

  • Fridge: Store covered, up to 4 days. Reheat in the microwave with a splash of water so it doesn’t dry out.

  • Freezer: Yep. Just let it cool first. Portion it into containers and freeze up to 3 months. Thaw overnight in the fridge or reheat straight from frozen—oven at 350°F until hot.

The noodles soften up a bit in the fridge, but the flavors? Even better the next day.

One Last Thing Before You Go

Look, I’m not saying this casserole will change your life… but I am saying it might keep you from losing your mind on a Tuesday night when you’re already 37% overwhelmed and just want something hot, cheesy, and comforting without having to cry over dishes.

Give it a try. Make it once, and it’ll become one of those meals you just know. The kind you make without measuring, while wearing fuzzy socks, with music playing in the background and maybe a kid or two hanging around asking when it’ll be ready.

And hey—if you try it, I want to hear about it. Did you add something wild? Did your picky eater go back for seconds? Tell me everything in the comments or send me a message. I’ll be here, probably eating this again for lunch.

With love and mozzarella,

Dump and Bake Meatball Casserole

Prep Time 5 minutes
Cook Time 40 minutes
Course Main
Cuisine American, Italian-American

Ingredients
  

  • 1 16 oz package cavatapi pasta, uncooked
  • 1 25 oz jar marinara sauce
  • 3 cups water
  • 1 14 oz package cooked meatballs (no need to thaw)
  • 1 1/2 cups Mozzarella cheese, grated
  • 1/2 cup Parmesan cheese, grated

Instructions
 

  • Preheat oven to 425°F.
  • In a 9x13-inch baking dish, combine uncooked pasta, marinara sauce, water, and frozen meatballs. Stir well.
  • Cover dish tightly with aluminum foil and bake for 35 minutes.
  • Uncover dish, stir, and check pasta doneness. If pasta is still firm, re-cover and continue baking until al dente.
  • Once pasta is al dente, remove foil, sprinkle with mozzarella and parmesan, and bake uncovered for 5–10 minutes until cheese is melted.
  • Serve warm and enjoy!

Notes

You can add frozen spinach or sautéed mushrooms for extra veggies.
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