When I started college, I still had somewhat of a picky palette. Would pick a lot off my meals and stick to safer foods. My partner at the time started coercing me to try foods or ingredients I didn't like, for example sliced raw tomato on a deli sandwich. This ended up working very well for many things: tomato, broccoli, cauliflower, pineapple, and a few others. This could've been attributed to me "growing up" or finally being exposed to better preparations than what I had before college, but I like to think she had the largest influence.
The only one that wouldn't work is pickles. Couldn't stand them despite liking cucumbers and vinegar. For all other foods, I'd forcibly eat them until one day I'd form a "craving", somewhat Stockholm syndrome-ing myself. Pickles never worked. At least, not for 9 years from when this venture began. During this past August, while grocery shopping I finally got my craving so I bought a jar and finished it within 2 days.
Next up, maybe red wine or beer.
Somewhere in the distance, I think I heard an egg just crack