How did Balaji Nevasakar's family use Udi to avert humiliation during the anniversary feast?

Chapter 35 explains how the Nevasakar family used Udi during a crisis at Balaji's Shraddha ceremony. When the number of guests unexpectedly tripled, Balaji's mother-in-law demonstrated immense faith. She took a handful of Udi, put it in every food pot, and covered them with cloths. She firmly instructed her daughter-in-law to serve happily, only lifting the cloth enough to take out food and then immediately covering it again. By following this process, which was rooted in the belief that the food was from Sai's house and he would protect their honor, the food never ran out, thus saving the family from the shame of a shortage.