Rice and Cheese Souffle

Ingredients

• 2 T. butter or margarine
• 2 T. all-purpose flour
• 1 cup milk
• 1/4 tsp. salt
• 1 cup (1/4 lb.) shredded Cheddar cheese
• 3 eggs, seperated
• 1 cup cooked regular rice
• 1/4 tsp. cream of tartar