Super easy lasagna, hot from the slow cooker.
Cook the beef, onion, and garlic in a big skillet over medium heat until brown. Add the tomato sauce, tomato paste, salt, and oregano and stir it all together until well incorporated. Keep cooking until everything's heated through.
In a big bowl, mix the cottage cheese, grated Parmesan, and shredded mozzarella.
Spoon a layer of the meat mix onto the bottom of the slow cooker pot. Add a double layer of the uncooked lasagna noodles. It's okay to break the noodles up if you need them to fit in the cooker's pot. Top the noodles with a portion of the cheese mixture. Keep making layers in that order until all the ingredients have been used.
Put the cover on an cook on low for 4 to 6 hours.