The answer I'm going for is to tell the truth, and I don't see why that should create a problem. Yes, time and effort have been spent in order to prepare that meal, and she's the only one at the table who seems to have a problem with it while all the others are digging in and helping themselves to seconds. But there is a way to make everyone happy, and that's to behave in a congruent manner.
Congruence is a term most of us have tried to avoid since highschool geometry and algebra, but fret not - in the words of Billy Connolly: I have no intention of going there. In this case, congruence is the term for being true to yourself. I mean this not just in a fashion-sense, but rather in your dealings with yourself and in your relationships with other people. You may find it has to do with self esteem and honesty. As far as I'm concernced it's all interlinked, which means by changing one behaviour (or even just your attitude), you can change them all.
To be congruent implies that you laugh when you're happy and cry when you're sad, and what's more - you don't feel bad about it. You live according to your values and you're not afraid to admit to your fears. Being congruent also means giving unpleasant feedback, but if you find a way to communicate without putting blame on the other person, nobody's feelings will get hurt. In this case, the young woman has the option to thank the host for the wonderful meal and acknowledge the love that went into making it. She should then also be able to confess that it is not to her taste and ask if she can go fix herself a sandwich.
There's no point in being overly mortified or humble, because she should not have to apologise for her taste. She may want to acknowledge it if she thinks the situation is awkward, but I'm convinced the less of a deal one makes of it, the easier it will be for the host to gracefully accompany you to the kitchen and point you towards the pantry. After all, nobody's attacking them as a person, and if their self esteem is intact, i.e. not depending upon everybody loving their food, they will see that this is just a case of someone preferring their meals prepared in a different manner. The easiest comparison here is that not everybody loves steak, and even amongst those who love it, they don't all eat it done equally.
Over the next few weeks I'd like to talk some more about self esteem and congruent behaviour, and give you some markers what to look out for as well as some tools to work with.
Til next time!
For those of you unfamiliar with the Billy Connolly reference, you can watch the stand-up sequence here. Caution, contains explicit and strong language!