Spray the inside of a 6 quart crock-pot with cooking spray. In a large skillet, brown the ground beef, along with the chopped onion, garlic powder, Italian seasoning, and pepper. Stir the tomato sauce and tomato paste in with the ground beef. In a separate bowl, stir together the cheeses and the water, set aside. Spread about 1/4 of the meat sauce on the bottom of the crock-pot. Cover meat sauce with a layer of uncooked lasagna noodles (you will have to break them to make them fit.). Then, top the noodles with a layer of the cheese mixture. Repeat layers, beginning with the meat sauce again. Keep repeating layers. It will make 3-4 layers, depending on the shape of your Crock Pot, how thick you make the layers, etc.
Cook on low for 4-5 hours.