Scramble the ground chuck/beef with the chopped onion until browned. Add some salt, pepper and garlic powder, if desired. Drain grease off, if needed.
Add pasta sauce, tomato sauce, a cup of water and stir.
Mix ricotta, 2 cups of mozzarella cheese, ¼ cup of parmesan, the beaten egg and Italian seasoning until blended.
Take a cup of the sauce and spread it on the bottom of a 13x9 casserole pan. Lay down the 3 lasagna noodles and add a fourth, at the bottom of the pan (if needed.). You may have to break a small portion off to get it to fit.
Take ⅓ of the cheese mixture and spread it over the noodles.
Repeat layers of sauce, noodles, the cheese mixture 2 more times, ending with the sauce.
Sprinkle with the remaining mozzarella and parmesan.
Spray a sheet of foil with cooking spray and cover. Bake in preheated oven at 350 degrees for 45 minutes.
Let stand about 10 minutes before serving.