What is the story of the devotee who brought khichdi for Sai Baba?

The story, detailed in Chapter 28, tells of a lady from Akola who had made a vow to offer khichdi to Sai Baba. After arriving in Shirdi, fourteen days passed without her being able to make the offering. On the fifteenth day, driven by her resolve, she went to Baba at noon, only to find he was already eating behind a curtain. Unwilling to be delayed further, her eagerness was so great that she moved the curtain with her own hand, entered by her own authority, and fulfilled her desire to offer the khichdi. Baba's reaction was one of great delight, which amazed all who were present.