Drain pineapple. Add enough water to juice to make 2 cups liquid. In 1/4 cup of this liquid, soak gelatin 5 min. Heat until hot, 3/4 cup of the liquid, in it dissolve the gelatin mix, sugar and salt. Add remaining cup liquid , lemon juice and few drops green food coloring

Place in refrigerator until cold and beginning to set. Add pineapple, cream cheese, nuts and celery. Fold in whipped topping.