I've grown up eating unripe jackfruit as a vegetable, cooked in coconut milk along with a bit of protein, be it some pork or some dried fish. Never really taken a close look at which part of the jackfruit is being used though, but it's the part with the seeds. I enjoy finding the surprise (cooked) seeds since they're really nutty and complements well with the rest of the flavors of the dish.
Anyways, my point is that unripe jackfruit can make for a good savory topping for pizza.
That's similar to the way my mom usually cooks hotdogs and sausages.
My method, however, since I'm lazy, is to:
It's usually the same result, but in less time and less worrying that the water has already boiled off and I'm already starting to burn the hotdogs (or sausages).