Preheat oven to 375°F (190°C).

In a large saucepan, cook ground beef, onion, and garlic over medium heat until beef is browned. Drain fat.

Stir in crushed tomatoes, tomato paste, basil, oregano, sugar, salt, and pepper. Bring to a boil. Reduce heat and simmer for 30 minutes.

Cook lasagna noodles according to package instructions. Drain and rinse with cold water.

In a medium bowl, mix together ricotta cheese, egg, and salt.

Spread 1 cup of meat sauce in the bottom of