Could you tell me the story about Laxmichand, Sai Baba, and the khaja prasad?

Certainly. The story is a beautiful example of Baba's leelas. As told in Chapter 28, Sai Baba specifically instructed his devotees to bring him a plate full of khaja for the afternoon naivedya (food offering). At this very time, a devotee named Laxmichand was in the crowd, feeling intensely hungry and also experiencing back pain. With his divine insight, Baba addressed Laxmichand's unspoken state by saying, "Hunger has come, that's good... Now the wind of khaja has blown." After the arati concluded, Laxmichand received the khaja prasad, which fulfilled his deep desire, filled his heart with joy, and cemented his devotion to Baba from that day forward.