Can you train yourself to like certain foods?

I think my main problem is kind of what Sarah has been talking about. Just SEEING vegetables in my food kind of grosses me out and makes me not want to take a bite. Ex like if I have something with little bits of onion in them, if I even see one I'll suddenly be trying to pick out every single one of them. @_@ unfortunately for me, there's no place to go that really has a nice assortment of vegetables...just the local wal-mart that carries the stuff that everybody eats that I tend to avoid. I'll go pick some up sometime and give some things a whirl.