2 1/2 c. soft bread crumbs (4-5 slices)
1 c. shredded cheddar cheese
2 (6 oz.) cans tuna, drained
1/2 c. milk
3 eggs, separated
1 tbsp. lemon juice
1 tsp. minced onion
1/2 tsp. salt
1/4 tsp. dry mustard
1/4 tsp. cream of tartar
2 tbsp. butter
1/2 tsp. poppy seed

Mix 2 cups of bread crumbs, the cheese, tuna, milk, egg yolks, lemon juice, onion, salt and mustard together. Beat egg whites and cream of tartar until stiff but not dry; fold into tuna mixture. Pour into 1 1/2 quart casserole. Elevate dish on inverted 9" pie pan in microwave. Cover loosely and microwave at 50% for 4 minutes. Rotate pan to microwave 4 to 7 minutes. Let stand 5 minutes. Mix remaining bread, butter and poppy seed. Sprinkle on casserole. Broil in oven 2 to 3 minutes until brown.