Step 1: Prepare the Flavorful Meat Sauce

Begin by heating olive oil in a large skillet over medium heat. Once the oil is warm, add the diced onion and cook for a few minutes until it becomes soft and translucent. This step builds the foundation of flavor.

Add the minced garlic and stir for about 30 seconds until fragrant. Immediately add the ground beef and cook until fully browned, breaking it apart with a spoon as it cooks. Season the mixture with salt and Italian seasoning.

Once the beef is browned, pour in the diced tomatoes along with their juices and the tomato puree. Stir everything together thoroughly. Allow the sauce to simmer for about 10 to 15 minutes so the flavors meld together and the sauce thickens slightly.

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Step 2: Prepare the Creamy Ricotta Mixture

In a mixing bowl, combine the whole milk ricotta, egg, and freshly grated Parmesan cheese. Add a pinch of salt and mix until smooth and fully incorporated.

This mixture adds richness and helps create those classic creamy layers that make lasagna so satisfying.

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Step 3: Prepare the Slow Cooker Base

Lightly grease the inside of your slow cooker with a bit of oil or nonstick spray. This prevents sticking and makes serving easier later.

Spread a thin layer of the meat sauce at the bottom of the slow cooker. This step ensures the noodles do not stick and begin cooking evenly from the base.

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Step 4: Begin Layering the Lasagna

Break the lasagna noodles as needed to fit into the slow cooker. Place a layer of noodles over the sauce.

Add a layer of the ricotta mixture, spreading it evenly. Follow with a generous portion of meat sauce, then sprinkle mozzarella cheese over the top.

Repeat this layering process in the following order:

• Noodles
• Ricotta mixture
• Meat sauce
• Mozzarella

Continue until all ingredients are used, finishing with a final layer of meat sauce and mozzarella on top.

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Step 5: Add Water and Final Touches

Pour the 1/2 cup of water evenly around the edges of the slow cooker. This helps create steam and ensures the noodles cook properly without drying out.

Cover the slow cooker with the lid.

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Step 6: Cook the Lasagna Slowly

Set the slow cooker to low and cook for about 4 to 5 hours. Avoid opening the lid frequently, as this releases heat and can affect cooking time.

The lasagna is done when the noodles are tender and the cheese is fully melted and bubbly.

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Step 7: Rest Before Serving

Once cooking is complete, turn off the slow cooker and allow the lasagna to rest for about 20 to 30 minutes.

This resting period is crucial because it allows the layers to set, making it easier to slice and serve without falling apart.