Cut sausage into slices. In a large skillet add: sausage, ground beef, mushrooms, and onions. Sprinkle with Italian seasoning. Brown until cooked through. Drain and add one jar of spaghetti sauce to the meat mixture.
Mix the water with the other jar of spaghetti sauce. Spread a small amount on the bottom of the crock pot to prevent sticking.
Place a layer of noodles in the bottom of the crock pot. You may have to break into pieces to fill in spots.
Layer with sauce, meat mixture, spoonfuls of ricotta, and mozzarella on top of the noodles. Repeat layers.
Cover and cook on low for 5 hours or high for 2 1/2 hours.