Slow-Cooker Lasagna

1 lb. ground beef
1 C. chopped onion
2 cloves garlic, minced
29-oz. can tomato sauce
6-oz. can tomato paste
1 C. water
1 t. salt
1 t. dried oregano
16-oz. pkg. shredded mozzarella cheese
16-oz. container cottage cheese
1/2 C. grated Parmesan cheese
10 lasagna noodles, uncooked

Brown beef, onion, and garlic in a large skillet; drain.  Add tomato sauce, tomato paste, water, salt and oregano; set aside.  In a medium bowl, stir together cheeses.  Layer 1/3 meat sauce, 1/2 uncooked lasagna noodles (broken to fit slow-cooker) and 1/2 cheese mixture in a slow cooker.  Repeat layers, finishing with meat sauce.  Cover and cook on low setting for 4 to 5 hours.  Serves 6 to 8.