Actually, if something is tasteful, it has nothing to do with tasting food. Tasteful means proper, nice, right. The only proper synonym I can think of right now is the Latin decorum, meaning right and proper.
Actually on the second thought, tasteful has a bit different meaning. Google brings up a definition "showing good aesthetic judgement or appropriate behaviour", so it would not work in this sentence after all. Stick to "tasty" or "delicious" :)