Step 1

Spray the crock of a slow cooker with non-stick cooking spray.

Step 2

In a skillet set over medium-high heat, brown the ground beef, onion, garlic, Italian seasoning, and salt for 5 minutes, until onions are softened.

Step 3

Stir in the marinara sauce and ½ cup of water, then simmer for 5 minutes.

Step 4

Meanwhile, in a large bowl, combine the ricotta cheese, 1 cup mozzarella cheese, parmesan cheese, egg, basil, and pepper.

Step 5

Evenly spread 1 cup of the meat sauce on the bottom of the crock, then top with 3 noodles, breaking them to fit. Gently spread a third of the cheese mixture on top of the noodles.

Step 6

Repeat two more times, beginning with sauce and ending with cheese, creating 3 layers. Sprinkle the remaining mozzarella cheese on top.

Step 7

Cover and cook on low for 4 hours, until noodles are tender. Top with fresh basil, if desired.