Pastisio (or Greek Lasagna)

1 lb ground beef, browned
1 onion, chopped
1 clove garlic, minced
8 oz can tomato sauce
1 t. dried oregano
1 t. salt
1/2 t. cinnamon
2 c. elbow macaroni, uncooked and divided
1/4 c. butter
3 T. all-purpose flour
1/4 t. pepper
1/4 t. nutmeg
2 c. milk
2 eggs
1/4 c. grated Parmesan cheese

Combine beef, onion and garlic in skillet; heat until onion and garlic are tender. Stir in tomato sauce, oregano, salt and cinnamon; simmer for 5 minutes. Set aside. Spread one cup macaroni in a greased baking pan; cover with meat sauce. Top with remaining macaroni; set aside. Melt butter in a saucepan; whisk in flour, pepper and nutmeg until smooth. Gradually pour in milk; heat until thickened. Remove from heat; whisk in eggs and Parmesan cheese. Pour over macaroni; bake at 350 degrees for 45 minutes.