1 lb lean ground beef 
 1 onion, chopped 
 2 garlic cloves, smashed 
 1 (28 ounce) can  tomato sauce
 1 (6 ounce) can tomato paste 
 1 1/2 teaspoons salt 
 1 tablespoon dried oregano 
2 teaspoons basil
2 tsp. parsley
 12 ounces ricotta cheese
1 egg
  1/2 cup grated parmesan cheese
 12 ounces lasagna noodles, uncooked 
 16 ounces shredded mozzarella cheese
Brown ground beef, onion and garlic in frypan. 
Add tomato sauce, tomato paste, salt , oregano, basil and parsley.
Cook for 30 to 45 minutes.
Mix together ricotta, egg and parmasean cheese.
Spoon a layer of meat sauce onto the bottom of the slow cooker. 
Add a double layer of uncooked lasagna noodles (break to fit) and top with cheeses. 
Repeat with sauce, noodles and cheeses until all are used up. 
Cover and cook on low for 4 to 5 hours.