What was the specific miracle involving grapes that transformed Boss Dharamsee's skepticism into faith?

The miracle of the grapes is a powerful story of transformation detailed in Chapter 35. A devotee named Kaka offered grapes with seeds to Sai Baba. Baba began distributing them, and Boss Dharamsee, a skeptic who disliked this variety, was hesitant. He thought Baba should know his preference. Baba, aware of his thoughts, gave him even more and commanded him to eat them. Upon obeying, Dharamsee was astonished to find the grapes were completely seedless. Chapter 35 highlights his amazement: 'He thought, "What a strange power! What is impossible for these saints?"' He later confirmed with another devotee, Tarkhad, that his own grapes did have seeds, solidifying the personal nature of the miracle.