Spaghetti Pie

I made this recipe last week. It was very good. The three of us really enjoyed it.

6-oz. spaghetti
2 eggs, beaten
1/4 cup grated Parmesan cheese
2 T. butter
1/3 cup chopped onion (use to your liking)
1 cup sour cream
1 lb. hamburger (I used ground turkey, Matt's idea, very good idea)
12-oz. spaghetti sauce
Grated mozzarella cheese

Cook spaghetti; drain. Add eggs and Parmesan cheese. Put in greased 10-inch pie plate. Melt butter; add onions and saute. Add sour cream; spoon over spaghetti. Brown hamburger; add spaghetti sauce. Spoon over sour cream mixture. Top with mozzarella cheese. Bake at 350 for 25 minutes.