In a large skillet cook meat, onion and garlic until brown. Drain. Add tomato sauce, paste, oregano. Cook until heated.
Mix all the cheeses together
Spoon layer of meat mixture onto the bottom of slow cooker. Add a double layer of the uncooked lasagna noodles. Break to fit the noodles in the slow cooker. Top noodles with a portion of the cheese mixture. Repeat layering until everything is used.(3 layers). Cover and cook on low for 4-6 hours.