Vegetable Tuna Pie

Ingredients

• 1 egg, slightly beaten
• 1/2 c. mayonnaise
• 1/4 tsp. salt
• 1/4 tsp. dry mustard
• dash of ground red pepper
• 3 Tbsp. chopped onion
• 3 Tbsp. chopped green pepper
• 1/2 c. dry bread crumbs
• 1 (6 1/2 oz.) can lite tuna (undrained)
• 1 (10 oz.) pkg. frozen mixed vegetables, cooked and drained
• 1/2 c. (2 oz.) shredded Cheddar cheese, divided