Ingredients
- Jumbo Pasta Shells (12-ounce box): These are the vessel for our delicious filling. You’ll need about 24-30 shells, but it’s wise to cook the whole box as some will inevitably break during boiling.
- Whole Milk Ricotta Cheese (32 ounces): The star of our filling. Using whole milk ricotta is non-negotiable for a luxuriously creamy and rich texture that part-skim versions can’t replicate.
- Frozen Chopped Spinach (10-ounce package): A fantastic and convenient way to add nutrients and color. Ensure it’s thoroughly thawed and squeezed bone-dry to prevent a watery filling.
- Grated Parmesan Cheese (1 cup, divided): This adds a salty, nutty depth of flavor. We’ll use most of it in the filling and reserve a little for sprinkling on top for that perfect golden-brown crust.
- Large Egg (1): This is the essential binder that holds the filling together, ensuring it stays creamy and doesn’t ooze out of the shells during baking.
- Shredded Mozzarella Cheese (2 cups): For that glorious, gooey cheese pull. It blankets the shells, creating a perfectly melted, bubbly top.
- Your Favorite Marinara Sauce (45-ounce jar): A high-quality store-bought marinara sauce is a brilliant time-saver. Choose one with a flavor profile you already love, as it forms the base of the entire dish.
- Yellow Onion (1, finely chopped): Adds a foundational layer of sweet, aromatic flavor to the sauce base.
- Garlic (3 cloves, minced): Provides that quintessential Italian aroma and a pungent, savory kick that elevates the entire dish.
- Olive Oil (1 tablespoon): Used for sautéing the onion and garlic, releasing their delicious flavors before they join the sauce.
- Italian Seasoning (1 teaspoon): A blend of dried herbs like oregano, basil, and thyme that adds a classic, savory Italian flavor to the ricotta filling.
- Salt (1 teaspoon, plus more for pasta water): Essential for seasoning every layer, from the pasta water to the filling and sauce.
- Black Pepper (½ teaspoon, freshly ground): Adds a touch of warmth and spice to balance the creaminess of the cheese.
- Fresh Parsley or Basil (for garnish, optional): A sprinkle of fresh herbs at the end adds a pop of vibrant color and a fresh, bright flavor that cuts through the richness.
Instructions
- Prepare Your Workstation and Oven: Begin by preheating your oven to 375°F (190°C). Select a large 9×13-inch baking dish or a similar 3-quart casserole dish. This preparation ensures that once your components are ready, the assembly process is smooth and efficient.
- Cook the Pasta Shells: Bring a large pot of water to a rolling boil. Be generous with the salt; this is your only chance to season the pasta itself. A good rule of thumb is 1 tablespoon of salt per gallon of water. Add the entire box of jumbo shells and cook according to package directions, but aim for the lower end of the time range for a perfect al dente texture. The shells should be pliable but still have a firm bite, as they will continue to cook in the oven. Once cooked, carefully drain them in a colander and rinse with cool water to stop the cooking process and prevent them from sticking together. Set them aside, arranging them in a single layer on a baking sheet if possible, to make them easier to handle later.
- Prepare the Flavor Base: While the pasta is cooking, heat the olive oil in a small skillet or saucepan over medium heat. Add the finely chopped yellow onion and sauté for about 4-5 minutes, or until it becomes soft and translucent. Add the minced garlic and cook for another minute until fragrant. Be careful not to burn the garlic, as it can become bitter. This step builds a crucial layer of aromatic sweetness that will elevate your store-bought sauce.
- Create the Sauce Bed: Pour about half of your large jar of marinara sauce (approximately 3 cups) into the bottom of your prepared 9×13-inch baking dish. Add the sautéed onion and garlic mixture to the sauce in the dish and stir to combine. Spreading this layer of sauce on the bottom prevents the pasta shells from sticking and infuses them with flavor from below as they bake.
- Make the Creamy Ricotta Filling: In a large mixing bowl, combine the 32 ounces of whole milk ricotta, the thawed and thoroughly squeezed-dry spinach, ¾ cup of the grated Parmesan cheese, the large egg, Italian seasoning, 1 teaspoon of salt, and ½ teaspoon of black pepper. Mix everything together with a spatula or wooden spoon until it is well-incorporated. The mixture should be thick and creamy. Do not overmix. A crucial tip: Squeezing every last drop of water from the spinach is the most important step for preventing a runny filling. You can do this by wringing it out in a clean kitchen towel or cheesecloth.
- Stuff the Shells: Now for the fun part! You can stuff the shells in one of two ways. The classic method is to use a small spoon to carefully fill each cooked shell with the ricotta mixture. For a faster, cleaner, and more professional approach, transfer the filling to a large zip-top bag, snip off one of the bottom corners to create a makeshift piping bag, and pipe the filling neatly into each shell. This method is incredibly efficient and less messy.
- Assemble the Casserole: As you fill each shell, nestle it open-side-up into the sauce in the baking dish. Arrange them in snug rows until the dish is full. Don’t worry if they are touching; this helps them support each other. Once all the shells are arranged, pour the remaining marinara sauce over and around the shells. You can be artistic, drizzling it over the top or filling in the gaps.
- Top and Bake: Sprinkle the entire dish evenly with the 2 cups of shredded mozzarella cheese and the remaining ¼ cup of grated Parmesan cheese. Cover the baking dish tightly with aluminum foil. This traps steam and ensures the shells cook through without the cheese burning. Bake in the preheated 375°F (190°C) oven for 25 minutes.
- Brown the Top: After 25 minutes, carefully remove the aluminum foil. Return the dish to the oven and bake for another 10-15 minutes, or until the sauce is bubbly and the mozzarella cheese is fully melted, golden brown, and slightly crispy in spots.
- Rest and Garnish: Remove the stuffed shells from the oven and let them rest on a cooling rack for at least 10 minutes. This crucial step allows the filling and sauce to set, preventing the shells from falling apart when you serve them. Just before serving, garnish with a sprinkle of finely chopped fresh parsley or basil for a burst of color and fresh flavor.
Nutrition
- Serving Size: one normal portion
- Calories: 550
- Fat: 29g
- Carbohydrates: 45g
- Protein: 28g