Don't you think your condition is special and do not apply to majority? But even if you are a picky eater, the solution seems easy. Just put on your plate enough for a tip of your tongue. If you don't like it it's fine, not much has been wasted that way. There you go. You can keep clear plate rule. Still, I think the major problem is not clear or not the plate but rather do you have an influence on how much it goes on the plate in the first place.