We used to have this all the time. I've never made it myself but, for a jello salad, it is actually quite refreshing and light.
The instructions say to make it in a mold but my aunt just does it in a 13 x 9 baking dish.
Grandma's Sunshine Salad Recipe
Ingredients
2 3-ounce packages lemon flavored gelatin
2 cups boiling water
1 cup ice water
1 9-ounce cans crushed pineapple with juice (cannot use fresh pineapple)
1 teaspoon lemon juice or white vinegar
Pinch salt
2 cups grated carrots
Method
1 Empty gelatin into a small mixing bowl. Stir in 2 cup of boiling water. Stir thoroughly until the gelatin has dissolved.
2 Stir in 1 cup ice water, one can of crushed pineapple with its juice, lemon juice (or vinegar), and a pinch of salt. (Make sure you use canned pineapple. Fresh pineapple has an enzyme that will prevent the gelatin from jelling.)
3 Chill in refrigerator until the gelatin starts to thicken. Then gently fold in the grated carrots until well mixed.
4 Add mixture to a jello mold. Set in the refrigerator until firm, several hours. To unmold, dip the bottom of the pan in hot water for about 5 seconds. Invert onto a serving platter, and shake firmly to release. Slice to serve.