Can you tell me about the time Sai Baba fulfilled a devotee's wish for a specific sweet?

Yes, this story involves a devotee named Laxmichand. As recounted in Chapter 28, Laxmichand was visiting Shirdi and, after having a small piece of khaja (a sweet), found himself craving more the next day. This desire remained in his mind. In a display of his inner knowledge, Sai Baba then specifically asked for a plate full of khaja as a naivedya, or food offering. Baba even mentioned Laxmichand's hunger and back pain, perfectly echoing his inner state. After the arati, Laxmichand received the khaja, and the fulfillment of this unspoken desire solidified his devotion to Baba.