Check Out The New Recipe From archanaskitchen.com . Here is a super easy version of jello with Watermelon. What’s more, it is vegetarian as well! The use of Agar agar (plant extract) instead of normally used gelatine to make this yummy party dessert will make your experience even more lovable. With only 2-3 ingredients, this jello is sure to be an addiction once in a while.