In a large skillet over medium heat, cook the ground beef until browned. Drain excess fat.

Add chopped onion and minced garlic to the skillet, cooking until softened.

Stir in crushed tomatoes, tomato paste, oregano, basil, salt, and pepper. Simmer for 20 minutes.

In a mixing bowl, combine ricotta cheese, 1 cup mozzarella cheese, Parmesan cheese, egg, and salt. Mix well.

Preheat the oven to 375°F (190°C).

Spread a thin layer of meat sauce on the bottom of a 9x13 inch baking dish.

Layer 3 lasagna noodles over the sauce, followed by half of the cheese mixture and a third of the meat sauce.

Repeat the layers, ending with noodles topped with remaining meat sauce and 1 cup of mozzarella cheese.

Cover the baking dish with foil and bake for 25 minutes.

Remove the foil and bake for an additional 15 minutes, or until the cheese is bubbly and golden.

Let it cool for 10 minutes before slicing and serving.