The Solanum quitoense, or 'Quito Orange', is easy to grow from seed and makes a very unusual ornamental plant, with it's large thorny leaves and fuzzy, orange fruit. The fruit I have tried is full of seed and, while edible, is not all that platable. Non-the-less, if you like to try new plants, it is a fun, interesting plant to grow.
I have heard there is a better tasting one that is eaten the natives in Equador, but I have never seen it. I do believe I have read that they make some sort of drink out of the fruit.
Ned