Tuna-Casserole Supreme

1/2 cup onion; chopped
1/2 cup green pepper; finely chopped
1 cup celery; chopped
8 tablespoon butter
1 can cheddar cheese soup
1/2 cup milk
8 oz mushrooms; sliced and drained
1 teaspoon salt
1 cup green olives; stuffed
6 1/2 oz tuna; drained and flaked
1 cup corn flakes; crushed
1/2 cup almonds; slivered
Preheat oven to 400 degrees F. In a large saucepan,
saute onion, pepper and celery in 4 T butter. Stir in
soup and milk, and cook over low heat 10 to 12
minutes. Add mushrooms, salt, pimiento stuffed
olives, and tuna. Pour into a 2-quart ca sserole. Melt
4 T butter; stir in corn flakes and almonds. Spread
on top of casserole. Bake, uncovered, 25 minutes