Ask the fairy. If you don't know what I'm talking about, throw the gold dubloon you got from Shadow Curios into the fountain. If you don't HAVE the gold dubloon, sorry to say it, you're softlocked.
simple answer; all of them. The first one she wants is the strawberry then she just goes down the list asking for each one(except for banana for some reason) also make sure to stock up on apples, cantaloupe, and watermelon, you'll need them for later.
