Steak And Kidney Pie - beef chuck strips

Ingredients

• 2 1/2 (10 oz.) boxes pie crust mix
• 2 lb. beef chuck strips, cut 2 x 1-inch
• 6 tsp. butter or margarine
• 2 veal kidneys
• 1 tsp. salt
• 2 (10 3/4 oz.) cans beef broth
• 1 pt. or can oysters
• 1/4 lb. fresh mushrooms, sliced in half
• 1 c. chopped onions
• 2 tsp. parsley, chopped
• 1/2 bay leaf, crumbled
• 1 tsp. dried thyme
• 1/4 tsp. pepper
• 1 egg yolk
• 1/4 c. flour