Pineapple Icing - cooking recipe

Ingredients

1 small can crushed pineapple (with juice)
1 c. sugar
2 Tbsp. flour
2 Tbsp. water
3/4 stick margarine

Preparation

Bring pineapple juice and sugar to a boil.
Make thickening of water and flour; add to mixture and cook over low heat until thickened, 2 to 3 minutes.
Remove from heat and add margarine and pinch of salt.
Spread over cake while warm.