Christmas Eve Buffet Supper - cooking recipe

Ingredients

1/2 c. butter or margarine
3/4 c. chopped onion
3/4 c. chopped green pepper
1 (6 oz.) jar sliced mushrooms with liquid
2/3 c. all-purpose flour
2 tsp. salt
1/4 tsp. pepper
4 c. milk
1 1/2 c. shredded sharp American cheese
1 Tbsp. lemon juice
1 tsp. powdered dry mustard
1/2 tsp. Worcestershire sauce
1 (12 oz.) can frozen cooked lobster meat
1 (12 oz.) pkg. frozen cooked crab meat
1 (8 oz.) pkg. fresh or frozen shrimp, cooked

Preparation

Melt butter in saucepan over moderate heat.
Stir in onion, green pepper and strained mushrooms.
Cook until onion is soft (about 5 minutes), stirring occasionally.
Remove from heat; blend in flour, salt and pepper.
Return to heat; stir in milk gradually, continuing to cook until thickened, stirring constantly.
Stir in cheese, lemon juice, mustard and Worcestershire sauce until cheese melts.
Break lobster and crab meat and add, with shrimp, to sauce.
Heat mixture to boiling point.