1 (15 1/4 oz.) can crushed pineapple in its own juice
1 c. miniature marshmallows
1 (8 oz.) carton Cool Whip or 2 pkgs. Dream Whip
1 pkg. sugar free Pistachio instant pudding
1 c. coconut

Drain pineapple. Add pistachio instant pudding to pineapple and stir. Let set a few minutes until mixture begins to thicken. Add marshmallows and stir. Blend in coconut and Cool Whip (or Dream Whip prepared according to directions on package). Pour mixture into a Pyrex dish and chill for 6 or more hours.