I may be biased since I'm also able to do this (and have gotten pretty good), but I'm reasonably sure it's a skill you can learn. Just take two things, make a prediction how they'd taste together, then try it and see how correct you were. If you keep doing this, you'll eventually be pretty good at predicting new things.

I've done this since I was a child (because it was always interesting to me), so it might take some time, but humans are very good at learning such patterns!

If you want something to start with, take a slice of banana and add mustard. It doesn't taste great (also not terrible), and the flavors mostly stay separate, but they combine a bit in an interesting way.