Easy Lasagna

I always struggle with making healthy meals for us during deployment. I hate making our "normal" portions while AJ is gone. It is depressing to have a half of a casserole left! I scaled down my normal lasagna size recipe!
Heat Oven to 375
1 jar Sauce
1/2 lb cooked ground beef ( I had some already cooked in my freezer.)
1 package mozzarella cheese
1 small container ricotta cheese
Fresh Parmesan cheese
1 egg

Mix egg. 1/2 mozzarella cheese, handful of Parmesan cheese together . Layer the pan with lasagna noodles and a layer of sauce. Layer cheese mixture and repeat with noodles and sauce. Top with sauce and the rest of the mozzarella cheese and Parmesan cheese. Bake 45 min to 60 min.