During the last few minutes of baking, add some grated mozzarella cheese down the center and broil. (shelovesbiscotti.com)
The next time around I might even spritz the muffins, in the last few minutes of baking, with rose water (or rose sugar water), or something along those lines, to heighten the floral aspect. (101cookbooks.com)
Sprinkle with crystallized sugar in the last few minutes of baking and serve with a sauce or whipped / ice cream. (epicurious.com)