Slow Cooker Creamy Spinach and Ricotta Stuffed Shells with Garlic Herb Tomato Sauce

There’s something about a slow cooker that just makes you sigh with relief—especially when it’s bubbling up with rich, cheesy goodness that smells like a warm hug on a cold evening. I’ve been making this creamy spinach and ricotta stuffed shells recipe for years, and it’s become one of my go-to meals for lazy Sundays when I want comfort food without spending all day in the kitchen. The slow cooker does the heavy lifting, letting the garlic-herb tomato sauce meld perfectly with the plump shells, while the ricotta keeps everything silky and satisfying. I love serving it straight from the pot with a crusty roll to soak up every last drop of sauce.

Slow Cooker Creamy Spinach and Ricotta Stuffed Shells with Garlic Herb Tomato Sauce

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Prep Time 45 minutes mins

Cook Time 7 hours hrs

Total Time 7 hours hrs 45 minutes mins

Servings: 6 servings

Calories: 426

Ingredients Method Notes

Ingredients

  

• 1 lb fresh spinach packed, stems removed
• 15 oz no-boil lasagna noodles or regular lasagna sheets, cut in half
• 15 oz whole milk ricotta cheese
• 1 cup shredded mozzarella cheese
• 1 cup shredded Parmesan cheese
• 1 large egg lightly beaten
• 1/2 cup heavy cream
• 1 cup canned crushed tomatoes
• 1 can (14.5 oz) canned diced tomatoes with juices
• 3 cloves garlic minced
• 1 tablespoon dried Italian seasoning
• 1 tablespoon olive oil
• 1 teaspoon salt
• 1/2 teaspoon freshly ground black pepper

Method

 

1. Place the heavy cream, crushed tomatoes, diced tomatoes with juices, minced garlic, Italian seasoning, salt, and pepper into the slow cooker and stir to combine. Cover and cook on low for 2 hours to let the sauce simmer and the flavors meld.

1. While the sauce cooks, bring a large pot of salted water to a boil. Cook the lasagna noodles according to package directions until al dente, then drain and rinse briefly with cool water to stop the cooking process. This prevents them from becoming mushy when stuffed.

1. In a large bowl, combine the ricotta cheese, half of the mozzarella, the Parmesan, the beaten egg, and the heavy cream. Mix until smooth and creamy.

1. Heat the olive oil in a large skillet over medium heat. Add the fresh spinach and sauté until just wilted, about 2 minutes. Remove from heat and let cool completely, then squeeze out any excess moisture using a clean kitchen towel or paper towels. This step is crucial to keep the filling from turning watery.

1. Fold the cooled, drained spinach into the ricotta mixture. Spoon about 2 tablespoons of the spinach-ricotta filling onto the center of each lasagna noodle, roll it up tightly like a cigar, and place seam-side down into the slow cooker, arranging them snugly in the tomato sauce.

1. Sprinkle the remaining mozzarella cheese over the top of the shells. Cover and cook on low for an additional 2 hours until the shells are tender and heated through. Do not stir after adding the shells to avoid breaking them.

Notes

Do not overcook the shells in the slow cooker, or they will disintegrate. Add them during the last two hours of cooking, and keep the lid on tight to prevent splatter from the rich filling. For a lighter version, swap half the ricotta for low-fat cottage cheese blended smooth in a food processor.

Food Safety Note: Always use a food thermometer to confirm your dish has reached a safe internal temperature before serving, and follow your country’s official food safety guidelines for meat, poultry, and slow-cooking. Cook times in this recipe are estimates — appliance and ingredient variation affects actual cook time.