There’s something about the way this tuna ziti casserole fills the kitchen with a warm, cheesy aroma that instantly slows down time. I remember one evening—somewhere between a hectic workday and an unexpected rainstorm—I pulled this dish from the oven, its golden top bubbling slightly, edges just crisp enough to hint at the layers beneath. The soft, tender pasta mingled with flaky tuna and a creamy sauce that stuck to the roof of my mouth in the best way. I almost forgot to set the table because I was so drawn in by that smell. And when I finally sat down, the first bite was just right—not too rich, not too plain, somewhere between the familiar and the kind of comfort only a home-cooked casserole can bring.

It’s not a dish I make every week, but when I do, it feels like a small celebration of simple ingredients doing their best work together. There’s a bit of a mess on the counter afterwards, sure, but that’s part of the charm. And hey, leftovers actually taste better the next day.

Why You’ll Love It

It’s a hearty, wholesome dish that doesn’t demand hours of prep—great for busy evenings.
The creamy cheese sauce and tender pasta come together in a way that feels indulgent but not overwhelming.
Incorporating tuna makes it a little different from your usual casseroles, adding a flaky texture and subtle flavor.
It’s simple—and that’s kind of the point. No fancy ingredients, just straightforward comfort food.

Sometimes I worry it might be too plain for a dinner party, but honestly, it’s perfect for family nights or when you want to curl up with something familiar after a long day.

Tuna Ziti Casserole

Print Recipe

A comforting and hearty tuna ziti casserole made with tender pasta, creamy cheese sauce, and flaky tuna, baked to golden perfection.

Prep Time: 15 minutes
Cook Time: 30 minutes
Total Time: 45 minutes
Yield: 6

Ingredients

Scale

12 ounces ziti pasta
2 tablespoons olive oil
1 medium onion, finely chopped
2 cloves garlic, minced
1 can (5 ounces) tuna in water, drained and flaked
2 cups shredded mozzarella cheese
1 cup grated Parmesan cheese
3 cups milk
3 tablespoons unsalted butter
3 tablespoons all-purpose flour
1 teaspoon salt
1/2 teaspoon black pepper
1/4 teaspoon dried oregano
1/4 teaspoon dried basil
1 cup frozen peas, thawed

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Instructions

Preheat the oven to 375°F (190°C).
Cook the ziti pasta in a large pot of boiling salted water according to package instructions until al dente, about 8-10 minutes. Drain and set aside.
In a medium saucepan, melt the butter over medium heat. Add the flour and whisk continuously for 2 minutes to form a roux.
Gradually whisk in the milk, continuing to whisk until the sauce thickens and is smooth, about 5-7 minutes.
Remove the sauce from heat and stir in salt, black pepper, oregano, and basil.
In a large skillet, heat olive oil over medium heat. Add the chopped onion and cook until softened, about 5 minutes. Add the minced garlic and cook for 1 minute more.
In a large mixing bowl, combine the cooked pasta, sautéed onion and garlic, flaked tuna, thawed peas, half of the mozzarella cheese, half of the Parmesan cheese, and the prepared white sauce. Stir gently to combine.
Transfer the mixture to a greased 9×13 inch baking dish. Sprinkle the remaining mozzarella and Parmesan cheese evenly on top.
Bake uncovered in the preheated oven for 20-25 minutes, or until the casserole is bubbly and the cheese on top is golden brown.
Remove from the oven and let it cool for 5 minutes before serving.

Kitchen Notes: You don’t need any special tools to pull this off—just a sturdy baking dish and a skillet for sautéing. If you’re serving this up, a crisp green salad or some roasted veggies add a fresh contrast. I’ve played around with swapping peas for spinach, but I’m not sure if I like it better or just different. Adding a pinch of red pepper flakes can bring a little kick, though I often hesitate because it might overpower the creamy sauce. Sometimes I toss in some chopped mushrooms when I have them on hand, but it’s not always a hit with everyone. That’s the beauty of this dish—you can tweak it without worrying too much about the rules.

FAQ

Can I use other types of pasta? Absolutely, though ziti’s shape holds the sauce well. Penne or rigatoni could work too.

Is this casserole freezer-friendly? I usually avoid freezing this one since the texture can change, but leftovers in the fridge reheat nicely.

What can I serve with it? A simple side salad or steamed veggies balances the richness perfectly.

Can I skip the peas? Sure! They add a pop of color and sweetness, but it’s fine without.

Ready to give this recipe a try? Your evening just got a little cozier.