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Easy Crockpot Stuffed Shells (No Boiling Required!)

These easy crockpot stuffed shells are filled with creamy ricotta and spinach and slow cooked in marinara — no boiling needed! Just 15 minutes of prep for a hands-off Italian dinner.
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Prep Time 15 minutes
Total Time 4 hours 15 minutes
Course dinner
Servings 3

Ingredients
  

  • 3 cups ricotta cheese: Provides a creamy base for the filling. If unavailable substitute with cottage cheese.
  • 6 ounces baby spinach steamed, drained, and squeezed dry: Adds nutrition and freshness. Makes sure to remove excess moisture to prevent soggy filling.
  • 2 cups mozzarella cheese shredded & divided: Melts beautifully, giving the dish its gooey, satisfying texture.
  • ½ cup Parmesan cheese grated, divided: Adds a sharp flavor accent. Can be replaced with Asiago if necessary.
  • 2 eggs lightly beaten: Used to bind the filling together, ensuring it holds within the shells during cooking.
  • 1 teaspoon Italian seasoning: Provides aromatic depth; make your own blend with oregano basil, and thyme if needed.
  • 1 teaspoon kosher salt: Enhances overall flavor balance.
  • ½ teaspoon onion powder: Infuses a subtle savory note; replace with minced onions for a fresher taste.
  • ½ teaspoon garlic powder: Adds a mellow garlic flavor without the raw bite.
  • ½ teaspoon black pepper: Offers gentle heat and enhances overall flavor.
  • 28 jumbo pasta shells: Large enough to hold plenty of filling; look for “conchiglie” at the store.
  • 26 ounces pasta sauce: Choose your favorite kind; marinara or arrabbiata for a spicier kick.

Instructions
 

  • Step 1: Prepare the Filling
  • In a medium bowl, combine ricotta cheese, steamed spinach, ½ cup mozzarella, ¼ cup Parmesan, eggs, and seasonings. Mix until well combined. This mixture should be rich and well-seasoned, ensuring each shell is packed with flavor.
  • Step 2: Fill the Shells
  • Spoon or pipe the ricotta mixture into each jumbo shell. This can be done quickly with a piping bag for precision, or a spoon if you prefer a rustic approach. Make sure each shell is generously filled for maximum satisfaction.
  • Step 3: Layer in the Cooker
  • Spread ½ cup of pasta sauce on the bottom of a 6-quart slow cooker. Arrange half of the shells in a single layer, then top with 1 cup of pasta sauce. Repeat with remaining shells and sauce. This layering ensures even sauce distribution and prevents the shells from sticking.
  • Step 4: Cook and Finish
  • Sprinkle the remaining mozzarella over the top. Cover and cook on high for 3-4 hours or on low for 5-6 hours. Check for doneness by ensuring the shells are tender and the cheese is melted and golden. Just before serving, add the remaining Parmesan and, if desired, a sprinkle of fresh parsley for a burst of color and freshness.

Notes

  • Squeeze the spinach dry: After steaming, squeeze every drop of moisture out of the spinach — excess water makes the filling runny and can make the shells soggy.
  • Fill generously: Don't be shy with the filling — a piping bag makes this fast and neat but a spoon works fine too.
  • Sauce coverage: Make sure the shells are well covered in sauce so they cook through evenly. Add a splash of water if needed.
  • Cook time: Low and slow is the move here — 5-6 hours on low gives the best texture. High heat can make the shells mushy.
  • Cheese on top: Add the remaining mozzarella in the last 30 minutes if you want it extra melty and golden.
  • Vegetarian friendly: This recipe is already vegetarian — just make sure your cheeses are rennet-free if strictly vegetarian.
  • Storage: Leftovers keep in the fridge for up to 3 days. Reheat covered with a splash of marinara to keep them moist.