Can you explain the story of Baba asking Dada Kelkar to buy meat, especially since he was a devout Brahmin?

Chapter 38 recounts an incident where Sai Baba tested the devotion of Dada Kelkar, an elderly and respected Brahmin known for his perfect conduct and adherence to Vedic duties. On Ekadashi, a fasting day, Baba ordered Dada Kelkar to personally go to Korhala to buy some meat, even providing him with the money for it. This order was described as a 'novelty' to Dada Kelkar. However, the narrative emphasizes that his mind was firm at the Guru's feet, suggesting this was a test of his obedience and that true offering (Dakshina) is the performance of a Guru's command, regardless of personal feelings or customs.