This is the kind of casserole you make on a busy weeknight when the clock is winning and the sink is already full. Instead of fussing with boiling and stuffing, you just scatter dry jumbo pasta shells into a glass casserole dish, pour a few simple ingredients over the top, and let the oven do the rest. It reminds me of the church potlucks back in our little Midwestern town, where practicality and comfort always came first. The shells soak up the sauce as they bake, turning into a cozy, bubbling pan of pasta that tastes like you worked much harder than you did.
Serve these oven jumbo shells hot right from the glass casserole dish with a simple green salad—iceberg or leaf lettuce with sliced tomatoes and a tangy vinaigrette fits the farmhouse mood just right. Warm garlic bread or buttered toast soldiers are perfect for swiping up every last bit of sauce from the pan. A side of steamed green beans or sweet corn, if it’s in season, rounds out the plate and keeps that classic Midwestern table feel. For a little extra comfort, offer grated Parmesan at the table so everyone can sprinkle on as much as they like.
5-Ingredient Oven Jumbo ShellsServings: 6
Ingredients
12 ounces dry jumbo pasta shells
3 cups jarred marinara or pasta sauce
2 cups water
2 cups shredded mozzarella cheese, divided
1 cup whole-milk ricotta cheese
Directions
Preheat your oven to 375°F (190°C). Set out a 9x13-inch glass casserole dish so it’s ready to go.
Pour the dry jumbo pasta shells straight into the glass casserole dish and spread them into an even layer. They will look a bit bare now, but they’ll plump up as they bake.
In a medium bowl, stir together the jarred marinara sauce and the water until well combined. This extra liquid is what allows the dry shells to cook through in the oven.
Dollop the ricotta cheese by spoonfuls evenly over the dry shells. You don’t need to be fussy; just tuck little mounds here and there across the top so every scoop later on gets some creamy pockets.
Sprinkle 1 cup of the shredded mozzarella evenly over the ricotta and shells. This first layer of cheese will melt down into the sauce and help everything cling together.
Slowly pour the marinara-and-water mixture all over the casserole, making sure to wet all of the shells. Gently shake the dish or press down lightly with the back of a spoon so most of the shells are nestled into the liquid. It’s fine if a few tips poke up.
Cover the casserole dish tightly with foil, crimping the edges to keep the steam inside. Slide it into the preheated oven and bake for 45 minutes, until the shells are mostly tender when you poke one with a fork.
Carefully remove the dish from the oven and take off the foil, watching for hot steam. Give the shells a gentle stir from the edges toward the center to make sure they’re all moistened and not sticking together in dry clumps.
Sprinkle the remaining 1 cup of shredded mozzarella evenly over the top of the casserole. Return the dish to the oven, uncovered, and bake for another 10–15 minutes, or until the cheese is melted, bubbly, and lightly browned in spots and the shells are fully tender.
Remove the casserole from the oven and let it rest for about 10 minutes before serving. This short wait helps the sauce thicken a bit and makes it easier to scoop neat portions. Serve warm right from the glass dish at the table.
Variations & Tips
You can change the personality of this simple bake just by swapping the sauce. Use a hearty meat sauce if you have leftover ground beef or sausage cooked in the fridge, or a tomato-basil sauce for something a little lighter. If you like extra richness, stir a handful of grated Parmesan into the ricotta before dolloping it over the shells, or add a pinch of dried Italian herbs to the sauce-and-water mixture. For a little color and crunch, scatter a handful of frozen peas over the dry shells before adding the cheese and sauce—they’ll cook right along with the pasta. If you’re cooking for smaller appetites, halve the recipe and use a smaller baking dish, checking a bit earlier for doneness. For food safety, keep the ricotta and shredded cheese refrigerated until you’re ready to assemble, and don’t leave the finished casserole out at room temperature for more than 2 hours; refrigerate leftovers promptly in shallow containers and reheat until steaming hot before serving again. Always use oven mitts and open the foil away from your face to avoid steam burns when uncovering the hot dish.
