Name: Easy Baked Pasta with Spinach
Prep time: 20 min
Cook time: 35 min
Total time: 55 min
Ingredients: 16 oz.rotini pasta; 10 oz.frozen spinach (thawed and excess water squeezed out); 124 oz.jar of your favorite marinara; 1 large egg; 2 ccottage cheese; 1 1/2 cshredded mozzarella; 1/2 cgrated parmesan; 3 garlic cloves (minced); 1 tspItalian seasoning; 1/4-1/2 tspcrushed red pepper; 1/2 tspcracked pepper; 1/2 tspsea salt; Fresh parsley or basil (optional)

Jump to Recipe Save it for Later

I love recipes that feel like comfort and come together without drama. This baked pasta hits that sweet spot: familiar flavors, forgiving steps, and a make-ahead friendliness that suits weeknights or company. It pulls from pantry staples and a jar of marinara to become something much better than the sum of its parts.

There’s a little bit of technique in squeezing the spinach dry and giving the cheeses time to meld with the pasta, but nothing intimidating. The structure is simple: cooked pasta, a creamy cheese-spinach mix, a layer of marinara, and a final bubbly bake with golden mozzarella on top.

If you want a dinner that travels well, freezes reliably, and still tastes fresh the next day, this is it. Read through the ingredients and steps once, then follow the recipe in sequence — it rewards a small bit of patience at the end with a crowd-pleasing, cheesy casserole.

What You’ll Gather

Quick note before you start: this is a hands-on-but-straightforward casserole. The ingredient list is compact and the method is linear. Gather the ingredients and a few basic tools, and you’ll be done in under an hour of active time plus bake and rest time.

Ingredients

16oz.rotini pasta — corkscrew shapes hold onto the sauce and cheese for every bite.
10oz.frozen spinach, thawed and excess water squeezed out — adds color and moisture control; squeezing prevents a watery bake.
124 oz.jar of your favorite marinara — provides the tomato base and acidity; the jar size works for layering.
1large egg — binds the cheese mixture so the casserole slices nicely.
2ccottage cheese — creates a creamy interior without relying only on heavy cream or ricotta.
1 ½cshredded mozzarella — mild melting cheese; the recipe staggers the mozzarella so some melts inside and some browns on top.
½cgrated parmesan — adds umami and a salty, nutty finish to the filling.
3garlic cloves, minced — fresh garlic lifts the tomato and cheese flavors.
1tspItalian seasoning — simple herb blend that keeps the casserole well-rounded.
¼-½tspcrushed red pepper — optional heat control; use less for kids, more for a kick.
½tspcracked pepper — fresh cracked adds more flavor than pre-ground.
½tspsea salt — seasons the filling; adjust to taste if your marinara is salty.
Fresh parsley or basil,optional — bright herb finish for color and freshness.

The Method for Baked Pasta with Spinach

Preheat oven to 375°F.
Bring a large pot of water to a boil. Cook 16 oz rotini pasta according to package directions until al dente. Drain well and transfer the pasta to a medium bowl.
In a separate bowl, combine 1 large egg, 2 c cottage cheese, ½ c grated parmesan, 1 cup of the 1 ½ c shredded mozzarella, 3 garlic cloves (minced), 1 tsp Italian seasoning, ¼–½ tsp crushed red pepper, ½ tsp cracked pepper, and ½ tsp sea salt. Stir or whisk until evenly combined.
Add 10 oz frozen spinach (thawed and excess water squeezed out) to the cheese mixture and stir until evenly distributed.
Add the drained pasta to the cheese–spinach mixture and stir gently until the pasta is well coated.
Lightly spray a 9×13-inch baking pan with oil. Spread about half of the marinara sauce from the jar in an even layer on the bottom of the pan.
Pour the pasta mixture into the prepared pan and spread it evenly over the sauce.
Spoon the remaining marinara sauce over the pasta and spread it to cover the top. If not baking right away, cover the pan and refrigerate.
Bake uncovered at 375°F for 30–35 minutes, until the sauce is bubbling around the edges.
Remove the pan from the oven and sprinkle the remaining ½ cup shredded mozzarella evenly over the top. Return to the oven and bake 10 more minutes, or until the cheese is fully melted and beginning to brown.
Let the baked pasta rest 5–10 minutes before serving. Garnish with chopped fresh parsley or basil, if desired. Store leftovers in the refrigerator or freeze.

Why This Recipe Works

This dish balances texture and moisture. The rotini’s spirals trap the cheese-spinach mix and sauce, so every forkful has tomato, cheese, and greens. Using cottage cheese gives you creaminess with less heaviness than a full ricotta or heavy cream, and the egg helps the filling set so the casserole slices cleanly.

Layering a thin bed of marinara under the pasta prevents sticking and adds a concentrated hit of tomato against the creamy interior. Finishing with mozzarella ensures a gooey, golden top that brings contrast in temperature and texture when you serve it.

Substitutions by Category

Pasta

Swap rotini for fusilli, penne, or ziti — any shape that catches sauce will work.

Greens

Replace frozen spinach with fresh spinach (about double the volume before wilting) — briefly sauté and squeeze dry before adding.

Cheeses

Use ricotta instead of cottage cheese for a smoother, silkier filling. Swap part of the mozzarella for fontina or provolone for a deeper melt.

Sauce & Flavor

If you prefer a chunkier sauce, use a rustic marinara; for herb-forward flavor, add a spoonful of pesto to the interior mixture before baking.

Heat & Seasoning

Adjust crushed red pepper to taste. Add a pinch of nutmeg to the cheese mixture for warmth if you like more nuance.

Tools & Equipment Needed

Large pot for boiling pasta.
Colander to drain the pasta.
Medium mixing bowl for combining the pasta and cheeses.
Small bowl for whisking the egg and combining cheeses.
9×13-inch baking pan (glass or metal works).
Spatula or spoon for spreading and smoothing layers.
Measuring cups and spoons for accuracy.

Watch Outs & How to Fix

Too watery filling: If you skip squeezing the thawed spinach well, the casserole can be soggy. Fix by draining the excess on a clean kitchen towel or paper towels and pressing firmly. You can also let the assembled casserole rest uncovered in the fridge for 20–30 minutes before baking to tighten up.

Undercooked pasta: If your pasta is too firm after baking, it likely wasn’t cooked to al dente. Next time, boil until just shy of your preferred doneness — the bake finishes it. For the current dish, cover the pan with foil and bake 10–15 minutes longer with a splash of water or extra marinara to steam and soften.

Top burns before inside is hot: If the top is browning too quickly, tent the pan loosely with foil and continue baking until heated through, then remove the foil for the final few minutes to brown again if needed.

Variations by Season

Spring: Add fresh peas and a handful of chopped basil to brighten the casserole. Use fresh spinach lightly sautéed to keep its color.

Summer: Swap some marinara for fresh diced tomatoes and basil, and finish with a drizzle of high-quality olive oil right before serving.

Autumn: Stir in roasted butternut squash cubes and a pinch of sage for a cozy twist.

Winter: Fold in chopped, roasted mushrooms and a pinch of thyme for earthiness. Hearty winter greens like kale (sautéed) can replace or augment the spinach.

Behind-the-Scenes Notes

I test this recipe with several marinara brands to find the balance of sweetness and acidity that plays well with cottage cheese. A jar that’s too sweet can make the dish cloying; a tangier jar cuts through the richness. Taste the sauce first if possible and adjust the salt in the filling accordingly.

Also, the mozzarella split between the interior and top matters. Putting some inside gives every bite a stringy, melty quality. Saving half for the top creates that browned, bubbly finish that makes people reach for seconds.

Meal Prep & Storage Notes

Make-ahead: Assemble the casserole through step 8, then cover and refrigerate up to 24 hours before baking. Let it sit at room temperature 20–30 minutes before putting it into the oven if you’re baking straight from the fridge.

Leftovers: Store in an airtight container in the refrigerator for 3–4 days. Reheat portions in the microwave or in a 350°F oven covered with foil until warmed through.

Freezing: You can freeze the fully baked casserole (cool it completely first) for up to 3 months. Thaw overnight in the refrigerator and reheat in a 350°F oven until hot in the center. Alternatively, freeze before baking (assembled and covered tightly) up to 3 months; bake from a partially thawed state, adding about 10–20 minutes to the bake time and tenting with foil if the top browns too quickly.

Frequently Asked Questions

Can I use fresh spinach instead of frozen?

Yes. Use about double the volume of fresh spinach, wilt it briefly in a hot pan, then squeeze out excess moisture the same way you would with thawed frozen spinach.

Do I have to precook the pasta?

Yes. Precooking to al dente ensures the pasta finishes perfectly in the oven. Undercooked dry pasta won’t hydrate uniformly during the bake.

Can I make this vegetarian or gluten-free?

The recipe as written is vegetarian if you use a vegetarian-friendly marinara and cheese. For gluten-free, substitute your favorite gluten-free pasta and double-check labels on any processed ingredients.

How can I make it less salty?

Choose a low-sodium marinara and reduce or omit the added salt; taste the cheese mixture before combining. You can also rinse canned or jarred ingredients if they taste overly salty.

In Closing

This Baked Pasta with Spinach is the kind of recipe that fits into real life. It’s simple to assemble, flexible with ingredients, and reliably comforting. Make it for a hectic weeknight, a potluck, or a casual dinner with friends — it holds up in the fridge and in the oven, and it rewards those who plan ahead.

Follow the steps, mind the watch-outs, and don’t skip the resting time after baking. A little patience at the end makes for cleaner slices and a better eating experience. Enjoy — and if you try a seasonal variation, tell me what you added; I love hearing how a simple base can become something new.