Jelly, also called jam is a way of preserving fruit. Jelly is made from fruit cooked with sugar and then sealed into a jar. Strawberry jelly, as shown in the picture, is one of the most popular flavours. Jelly that is made from citrus fruits like oranges and lemons is called marmalade. In some countries, only clear jelly without any bits of fruit left in it is called jelly. In some other countries, jello is called jelly.