Pastitsio - cooking recipe

Ingredients

1 1/2 lb. ground beef
1 c. chopped onion
1 (16 oz.) can tomatoes, cut up
1 (6 oz.) can tomato paste
1/4 tsp. dried thyme, crushed
1 (7 oz.) pkg. elbow macaroni
4 slightly beaten egg whites
1/2 c. Feta cheese
1/2 c. butter
1/2 c. flour
1/4 tsp. cinnamon
4 c. milk
4 slightly beaten egg yolks

Preparation

In skillet, cook beef and onion until meat is browned; drain off excess fat.
Add undrained tomatoes, tomato paste, thyme and 1 teaspoon of salt.
Simmer, covered, for 30 minutes, stirring often.