Could you describe the story of Laxmichand and his desire for khaja?

Certainly. The story, narrated in Chapter 28, tells of a devotee named Laxmichand who, during a pilgrimage to Shirdi, was served a sweet called khaja as prasad. He enjoyed it so much that he wished for it again the next day, but it was not available. On the third day, in a wonderful leela, Sai Baba instructed a devotee to bring a plate full of khaja as a food offering. Later, Baba announced he felt like having khaja prasad and had it distributed. Laxmichand, who was very hungry, received the prasad, and his attachment was fulfilled, bringing immense joy to his heart and deepening his faith.