Cook the Italian sausage until there is no pink and it is crumbled. Once cooked transfer to a plate with a paper towel to absorb the grease. Set aside.
Combine ricotta cheese, egg, minced garlic, Italian seasoning and shredded Parmesan. Mix until thoroughly combined.
Spray inside of the slow cooker prior to layering ingredients.
Combine all jars of sauce. Spread 1/4 of the sauce along bottom of the slow cooker.
Layer 1/2 of the pasta, sausage, and ricotta mixture over the sauce.
The last layer should be the remaining sauce.
Cover and make sure the pasta is is completely covered with sauce. I blended my ricotta and sauce.
Cover and cook on high for 2 hours. Sprinkle shredded mozzarella on the top when there is only 15 min left to cooking. Re-cover.
Once mozzarella is melted, dinner is ready! Enjoy!