Can you summarize the story of Laxmichand's craving for khaja and how Sai Baba fulfilled it?

Certainly. The story from Chapter 28 of the Shri Sai Satcharitra recounts how a devotee named Laxmichand was visiting Shirdi. During a meal at Sathe's wada, he enjoyed some khaja (a sweet) served as prasad and subsequently developed a strong craving for more. This desire remained in his mind. Demonstrating his omniscience, Sai Baba later specifically asked for a plate full of khaja to be brought as a food offering to the masjid. After the noon arati, Baba announced that he felt like having khaja and instructed that it be served to everyone. In this manner, Laxmichand, who was feeling particularly hungry at that moment, received the prasad he had silently wished for, which deeply solidified his faith.