From Recipes for Food Allergies by Marilyn Gioannini. For people who do not use gelatin, agar-agar is a good substitute - and a good food in its own right, rich in vitamins and minerals. This salad is very light and tasty. Agar-agar has the interesting quality that it does not have to be refrigerated to jell. You can take this salad on a picnic on a hot day, and it will not melt.