Slow Cooker Lasagna

Introduction

Forget pre-boiling noodles and fussing with a hot oven. This recipe lets you build incredible lasagna directly in your slow cooker, resulting in perfectly tender noodles and melty, layered comfort food with minimal effort on your part.

Prep & Cook Time

Prep Time: 15 minutes

Cook Time: 195 minutes

Total Time: 210 minutes (3.5 hours)

Servings: 6

Ingredients

• 2 cups partly skim ricotta
• 3 garlic cloves (minced)
• ¼ tsp dried oregano
• ½ tsp pepper
• ¼ tsp red pepper flakes (optional)
• ½ cup Parmesan cheese (shredded)
• 1 can diced tomatoes (28oz can, drained)
• 3 ½ cups pasta sauce
• 1 handful flat leaf parsley (chopped)
• 3 cups mozzarella cheese (shredded)
• 4 cups baby spinach

Instructions

1. In a medium bowl, mix the ricotta, minced garlic, oregano, pepper, red pepper flakes (if using), Parmesan cheese, and chopped parsley. Set aside.
2. In another bowl, combine the drained diced tomatoes and pasta sauce.
3. Spread about 1 cup of the tomato-sauce mixture evenly over the bottom of a 6-quart slow cooker.
4. Arrange a single layer of uncooked lasagna noodles over the sauce, breaking them to fit the shape of your cooker.
5. Spread half of the ricotta mixture over the noodles. Top with half of the baby spinach, pressing it down gently.
6. Sprinkle 1 cup of the mozzarella cheese over the spinach.
7. Spoon another cup of sauce over the mozzarella.
8. Repeat the layers: noodles, remaining ricotta mixture, remaining spinach, 1 cup mozzarella, and 1 cup of sauce.
9. Finish with a final layer of noodles. Spread the remaining tomato-sauce mixture over the top noodles, ensuring they are completely covered.
10. Sprinkle the remaining 1 cup of mozzarella cheese over the top.
11. Cover and cook on LOW for 3 hours and 15 minutes (195 minutes). The lasagna is done when the noodles are tender and the center is hot and bubbly.
12. Turn off the slow cooker, uncover, and let it rest for 20-30 minutes before serving. This allows the layers to set for cleaner slices.

Variations

• No-Prep Layering: For a faster assembly, skip mixing the ricotta with the seasonings. Simply layer the plain ricotta, then sprinkle the garlic, oregano, pepper, and Parmesan separately.
• Meat Lover’s Twist: While assembling, brown a pound of ground beef or Italian sausage. Drain the fat and mix it into your tomato-sauce mixture before layering.
• Individual Portions: Use small, single-serving casserole dishes or mason jars (oven-safe) to create personal lasagnas. Adjust cooking time down to about 1.5-2 hours on LOW.
• Crusty Top Finish: For a browned, crispy cheese top, carefully transfer the finished lasagna to a baking dish and broil for 2-3 minutes after the slow cooker step.

Tips for Success

• No-Peeking Rule: Resist the urge to open the lid during cooking. This releases heat and steam, significantly increasing cooking time.
• Sauce Coverage is Key: Ensure every edge of the top layer of noodles is covered with sauce. Exposed noodles will remain hard and crunchy.
• Layer Gently: Don’t press down too hard on the layers as you build, especially on the spinach, to allow space for heat to circulate.
• Let it Rest: The resting period after cooking is not optional. It allows the lasagna to firm up, making it much easier to slice and serve.

Storage & Reheating

Store leftovers in an airtight container in the refrigerator for up to 4 days. Reheat individual portions in the microwave until hot, or cover the entire dish with foil and reheat in a 350°F oven for 20-30 minutes.

FAQ

1. Do I really not boil the noodles?

No! The uncooked noodles will absorb moisture from the sauce and spinach during the slow cooking process, becoming perfectly tender.

1. Can I use regular lasagna noodles?

Yes, you can, but the “no-boil” noodles designed for oven use work best and are guaranteed to cook through properly in this method.

1. Why did my noodles come out crunchy?

This happens if the noodles aren’t fully covered in sauce. Ensure every noodle, especially on the top layer, has sauce on it. Also, avoid cooking on HIGH, as it can cook the sauce away from the noodles before they soften.

1. Can I cook this on HIGH to save time?

It’s not recommended. Cooking on LOW allows the noodles to absorb liquid slowly and evenly. Cooking on HIGH can result in burnt edges, undercooked noodles in the center, and a soupy texture.

1. Can I use frozen spinach instead of fresh?

Yes, but you must thaw and thoroughly squeeze ALL excess liquid from a 10-oz package of frozen spinach. Using it without squeezing will make your lasagna watery.

1. Can I prep this ahead of time?

Absolutely. Assemble the lasagna completely in the slow cooker insert, cover tightly, and refrigerate overnight. Let it sit on the counter for 20-30 minutes before starting the cook time. You may need to add 15-30 extra minutes of cooking.