When my sis & I were very young perhaps 3 or 4 around that age mom had her SIL babysit when she was working. She provided a bit extra for food for us but when mom would ask want we had for "lunch" we said yellow mustard on a slice of (most likely) white bread!!!!!
Didn't eat mustard for decades!!!!
I don't remember ever really "hating" any food, much less getting over it. I've always liked pretty much everything, and those things I wasn't particularly fond of (few) I still don't care for. I guess it helped that preferences were always taken seriously, and we were never forced to eat anything we didn't care for, so long as we had genuinely tried it.