In a large skillet, cook sausage until browned. Drain excess fat.
Add marinara sauce and simmer for 10 minutes.
In a medium bowl, combine ricotta cheese and egg.
In a 9×13-inch baking dish, spread 1/3 of the sauce mixture. Layer with 1/2 of the noodles, 1/2 of the ricotta cheese mixture, 1/3 of the mozzarella cheese, and 1/4 cup Parmesan cheese.
Repeat layers and top with remaining sauce and cheeses.
Bake for 45 minutes or until bubbly and cheese is golden brown.
Interesting Facts
Lasagna is an Italian dish that has been around for centuries and is still a popular dish today.
Lasagna noodles are usually flat and rectangular, but they can also be round or even shaped into different shapes.
The word “lasagna” is derived from the Greek word “lasagnum”, which means “dish” or “bowl”.
Lasagna is traditionally served with a tomato sauce, but it can also be made with a variety of other sauces, such as cream or white sauce.