http://allrecipes.com/Recipe/hearty-lasagna/detail.aspx
Ingredients:
3 cups ricotta cheese
3 cups shredded mozzarella cheese
2 eggs
2 pounds ground beef
2 jars (48 ounces) marinara sauce
12 lasagna noodles (uncooked)
1/2 cup grated Parmesan cheese
Instructions:
Mix ricotta cheese, mozzarella cheese and eggs.
Cook beef in saucepan until browned. Stir in pasta sauce.
Spread 1 cup beef mixture in each of 2 2-quart shallow baking dishes. Top each with 2 lasagna noodles and 1 cup ricotta cheese mixture. Repeat layers. Top each with 2 lasagna noodles, remaining beef mixture and Parmesan cheese.
Cover with foil and bake at 400 degrees F for 30 minutes. Uncover and cook for an additional 15 minutes. Let stand 10 minutes.