In a large skillet, brown the ground beef with the chopped onion and minced garlic over medium heat. Drain off any excess grease.
1 pound ground beef
Stir in the crushed tomatoes, tomato sauce, oregano, basil, salt, and pepper. Bring to a simmer and cook for about 15 minutes, stirring occasionally.
1 pound ground beef
In a medium bowl, combine the ricotta cheese, egg, and Parmesan cheese. Mix well.
1 pound ground beef
Spread a thin layer of the meat sauce in the bottom of a 9x13 inch baking dish.
1 pound ground beef
Arrange 3 lasagna noodles over the sauce. Spread half of the ricotta cheese mixture over the noodles.
1 pound ground beef
Spoon about one-third of the remaining meat sauce over the ricotta mixture. Sprinkle with about one-third of the mozzarella cheese.
1 pound ground beef
Repeat layers: noodles, remaining ricotta mixture, another third of the meat sauce, and another third of the mozzarella cheese.
1 pound ground beef
Top with the remaining noodles, remaining meat sauce, and remaining mozzarella cheese.
1 pound ground beef
Cover the dish with aluminum foil and bake for 25 minutes.
Remove foil and bake for an additional 20 minutes, or until the cheese is melted and bubbly.
Let stand for 10 minutes before serving.
Notes
This lasagna freezes well. Let it cool completely, then wrap tightly in plastic wrap and then foil. Reheat in a 350 degree F oven until heated through.