Country Chicken Casserole

Filling

• 1/4 cup butter or margarine
• 1/3 cup all-purpose flour
• 1/2 teaspoon salt
• 1/4 teaspoon white pepper
• 2 cups half-and-half
• 2 cups cubed cooked chicken
• 1 package frozen mixed vegetables, thawed, drained

Topping

• 1 cup all-purpose flour
• 1/4 teaspoon baking powder
• 1/3 cup butter or margarine, softened
• 1/4 cup grated Parmesan cheese
• 1 egg