What is this plant? Is this a fruit or what?
It looks like Granadilla fruit, still green. Granadilla is native to South America and has a strong but fragile, orange skin. The fruit has the shape and size of a plum. The shell is hard and shiny. The fruit contains a yellow, jelly-like pulp with a scattering of black edible seeds. The fruit has a sweet and sour flavour.