vanilla pudding (no sugar)
20 oz. can pineapple, crushed (canned in juice)
8 oz. low-fat Cool Whip
8 oz. sour cream
1/4 c. shredded coconut (if desired)
1/4 c. chopped pecans (if desired)
large graham cracker crust

Mix all ingredients. Fold in Cool Whip. Put in crust. Refrigerate. May be frozen. Suggest cut into pieces before freezing.