You just say a word and think a quantity and it poofs into existence magically in front of you (no need to carry it, doesn't attract bears when unbidden, etc).
Let's assume the decision is final and you'll retain this exact ability for the rest of your life (only on the trail though! And the food cannot be bartered, given, or sold). Also, the food can be in any cooked state, but it has to be kept simple (magic food-delivering genies don't like complex things). Things like sandwiches and plain salads are ok, but turduckens with every veggie in existence are not. Or, if you absolutely must have something like that, you can't just wish the uneaten parts away and must be a good little leave-no-tracer and pack out what you don't consume.
I would want either raspberries or grilled freshly caught salmon. It's doubtful I'll ever tire of either and they're both on the harder end to obtain while hiking in most areas.