Passion fruit is a small round tropical fruit with a hard outer shell. The inside of a passion fruit is packed with edible seeds and a tart yellow-coloured pulp. There is also a layer of white membrane on the inside. Although this is edible, I wouldn't recommend eating it as it is very bitter. Passion fruit is highly nutritious and a good source of fibre and Vitamins A and C. You may also know passion fruit by its other name, which is granadilla.