01 -
Heat a skillet over medium. Add ground beef, onion, and 3 cloves minced garlic. Cook, breaking up beef until browned. Drain excess fat. Stir in marinara, tomato paste, Italian seasoning, and water. Mix well to combine.
02 -
In a bowl, mix ricotta cheese with 2 cloves minced garlic, 1 cup shredded mozzarella, Parmesan, parsley, and salt until thoroughly combined.
03 -
Lightly coat the inside of the slow cooker with non-stick spray.
04 -
Spread one-quarter of the meat sauce on the bottom of slow cooker. Layer one-third of the lasagna noodles, breaking as needed to fit. Spread one-third of the cheese mixture over noodles. Repeat the layering two more times, ending with remaining meat sauce.
05 -
Sprinkle remaining 1 cup of shredded mozzarella over the top.
06 -
Cover and cook on low for 5 hours or until noodles are fully tender.