Grandma's Yams

1 small can crushed pineapple
1 large can yams
1 cup pineapple juice
1/2 cup brown sugar packed
1/2 cup sugar
2 tbsp corn starch
1/2 cube butter

Combine all ingredients except for crushed pineapple and yams into a sauce pan. Heat. Bring to boil for 2 minutes, or until thickened. Take off the heat, and add crushed pineapple. Butter square casserolle dish, and add drained yams. Pour sauce over, and bake at 325 for 30 minutes.

**I like to add marshmallows to the top for the last couple minutes.**