Hawaiian Sausage Casserole

1 (20 oz) can pineapple chunks in juice -- drained
1 (16 oz) can whole sweet potatoes -- drained and cut into 1/2-inch slices
3/4 pound smoked sausage -- sliced
3 tablespoons brown sugar
2 tablespoons cornstarch
1/4 teaspoon salt
1 tablespoon butter or margarine

Drain the pineapple chunks, reserving the juice. Add enough water to the juice to measure 1-1/4 cups. Set aside.
Place pineapple chunks, sweet potatoes, and sausage in a 10- x 6- x 2-inch baking dish. Set aside.
Combine sugar, cornstarch, and salt in a saucepan. Gradually add pineapple juice mixture, stirring until blended. Cook, stirring constantly, until mixture thickens and comes to a boil; boil 1 minute, stirring constantly. Remove from heat and add butter, stirring to melt.
Pour over sausage mixture. Cover and bake at 350 degrees F. for 35 to 40 minutes. Yield: 8 servings..