Scrambled Egg Casserole

Ingredients

• 1/2 cup butter or margarine, divided
• 2 tablespoons all purpose flour
• 1/2 teaspoon salt
• 1/8 teaspoon pepper
• 2 cups milk
• 1 cup (4 oz) shredded Velveeta cheese
• 1 1/2 cups cubed fully cooked ham (abt 8 oz.)
• 1/4 cup sliced green onions
• 12 eggs, beaten
• 1 can (4 oz) sliced mushrooms, drained (optional)
• 3/4 cup seasoned bread crumbs
• Additional sliced green onions