When I am preparing a fish stock, I usually dissolve some chopped and diced anchovies (from a tin of Ortiz anchovies) in olive oil (garlic and onion, naturally); nobody gets the taste of anchovy in the sauce - what they get is a stunning sense of depth - the sort of umami sensation that enhances the fish flavours of the other ingredients.
Anchovy stuffed olives are addictive; (as are garlic stuffed olives, and er, others - pepper stuffed olives....almond stuffed olives, and so on.)
My dad used to think he hated garlic, yet kept complimenting me on my cooking (the was the late 80s) "wow, what did you do there, that's delicious"; eventually, I fessed up - a confession tat conceded that vast quantities of garlic somehow appeared in almost everything I cooked - and - immediately, form that moment on - his (assumed) dislike of garlic became consigned to the dustbin of history, and he happily devoured whatever I prepared, content in the knowledge that garlic was a feature of this dish.