Tuna Casserole

Grrrrrgh!
Course : Tuna
From: HungryMonster.com
Serves: 6
 

Ingredients:

1/3 cup margarine
3 tablespoons corn starch
1/2 teaspoon salt
1/8 teaspoon pepper
3 cups milk
1 medium Onion -- chopped
2 cans tuna -- drained and flaked (7 oz. each)
1 package elbow macaroni -- cooked and drained (8 oz.)
1 package frozen peas -- thawed (10 oz.)
1 cup shredded cheddar cheese
 

Preparation:

In saucepan melt margarine over medium heat. Stir in corn starch, salt and pepper until smooth. Remove from heat; gradually stir in milk until smooth. Bring to boil over medium heat, stirring constantly, and boil 1 minute; add onion. Place remaining ingredients in greased 2 quart casserole. Stir in corn starch mixture. Bake in 350F oven 25 minutes or until heated.