Depending on how new she is to you, it's probably a good thing that she's not trying all sorts of new foods yet. If you're still in the first couple of weeks, I'd keep her on as similar a diet as she was on before she came to live with you to help ease her transition -- unless, of course, her previous diet was dangerous. What kind of kibble was she/is she now on?
That said... In terms of introducing new foods, the idea is to take it slow. Also seems like every hedgie is a bit different in terms of what they like -- not so different from humans, eh? Mealies are typically a bit hit; although I had one hedgie who ran away from them... literally. Many seem to enjoy squash and sweet potato. I had one who loved peas.
Some hedgies take to these foods rather quickly; others can take weeks, months, or years. Given that, I'd choose hedgie-safe fruits and veggies that you like to eat so that (1) you can have them if hedgie decides not to partake and (2) you can present them to hedgie on multiple occasions over the course of a very long time in case it happens to take half a year before she figures out that it's food and that she'd like to eat it. You can present the foods to her when she's out during play/snuggle time. Or you can leave them in a little dish near her kibble and water dishes over night.
Try one for several nights in a row. If she eats it and there are no adverse effects (super messy poops, etc...), then you can put it into her regular treat rotation. If she doesn't eat it, try it again several nights in a row a few weeks (or a month) later.... then maybe a month or so after that if she's still not interested.
Nice that she's licked and anointed with the apple. Perhaps cutting it into smaller pieces may help bridge the gap between tasting and eating? Or maybe she might like apples... just a different kind of apple? Soon enough, she'll have you running in circles to please her