Ingredients

• 2 (3 ounce) packages lime-flavored gelatin mix (such as Jell-O®)
• 2 cups boiling water
• 2 cups cold water
• 4 red apples, chopped
• 4 stalks celery, chopped
• 1/2 cup chopped walnuts, or to taste (optional)

Instructions

1. Dissolve lime gelatin in boiling water in a bowl; stir cold water into gelatin. Pour gelatin into a mold.
2. Stir apples, celery, and walnuts into gelatin. Refrigerate until firm, about 4 hours. Dip mold into hot water to loosen salad; place a plate on top of the mold and invert to release salad from mold.