Classic Lasagna

Preheat oven to 375 degrees, and prepare a 9 X 13-inch baking pan by spraying it with cooking spray.
Boil water in large pot. Add box of lasagna noodles and cook as directed.
Cook onion and beef in frying pan until beef is browned.
Add jar of pasta sauce to beef mixture and let it simmer until ready to assemble lasagna.
Combine egg, ricotta, parmesan, parsley, oregano and garlic powder in a bowl. Mix and set aside.
Spread 1 cup of the meat sauce into the prepared baking dish.
Layer with 3 noodles, then spread half of the ricotta mixture over the noodles. Top with 3/4 c. mozzarella cheese and 1/3 of the meat mixture.
Repeat (noodles, ricotta, mozzarella, then meat).
Top with last layer of noodles and remaining sauce. Bake covered for 30 minutes.
Uncover and add remaining 1/2 c. mozzarella cheese, bake for 5 minutes.
Let it stand for 5 minutes then serve with slices of Cheesy Garlic Bread.