Whose servant am I?

Whose servant am I ?

Mulla Nasrudin had become a favourite at court. He used his position to show up the methods of courtiers.

One day the King was extremely hungry. Some aubergines had been so deliciously cooked that he ordered the cook to serve them every day.
"Are they not the best vegetables in the world, Mulla?" he asked Nasrudin.
"The very best, Majesty."
Five days later, when the aubergines had been served for the tenth meal in succession, the King roared:"Take these things away, I HATE them!"
"They are the worst vegetables in the world, Majesty," agreed Nasrudin.
"But Mulla, less than a week ago you said they were the very best."
"I did. But I am the servant of the King, not of the vegetable."