Brown ground beef in oil with onion and garlic
Add tomato paste, tomato sauce, water, salt, pepper, and oregano
Simmer for 30 minutes
Cook lasagne noodles according to package directions
Mix ricotta cheese, egg, parmesan cheese, salt and pepper
Spread thin layer of meat sauce on bottom of 12x8 inch baking dish
Add layer of noodles
Add layer of ricotta mixture
Add layer of mozzarella cheese
Repeat layers ending with meat sauce and mozzarella
Bake at 350°F for 30 minutes