Melon

 Melons is a item or block in Minecraft PE and come from the Nether Reactor. The Melon can be farmed easily, because after you harvest them, the stem will stay there and let another melon grow again, and it will keep growing melons again and again. When destroyed, it will drop 3-7 slices of melon (Based on the PC Version.) Also,melons cannot be crafted with 9 Melon slices but probably will be in the future.