Pineapple Topped Cake - cooking recipe

Ingredients

1 (18 ounce) package yellow cake mix
3 eggs (or as called for by your cake mix)
1/3 cup oil (or as called for by your cake mix)
1 1/3 cups water (or as called for by your cake mix)
1 (20 ounce) can crushed pineapple
1 cup sugar
3 tablespoons cornstarch
3 tablespoons water
8 ounces whipped topping
1/2 cup finely chopped walnuts (optional)

Preparation

Prepare and bake cake according to pkg instructions for a 13x9 inch pan.
Cool completely.
Mix pineapple and sugar in saucepan.
Bring to a boil.
Mix cornstarch and water; stir into pineapple.
Cook and stir for 1 minute; remove from heat.
Cool completely.
Cover cake top with pineapple mixture.
Top with whipped topping; sprinkle with nuts.