What is the fine-grained topic of the following text: While Beluga caviar is adored for whetting the appetite and Cristal champagne is a choice elixir to enliven the spirit, there is still no rival for the one delicacy that is quickly becoming the world’s most beloved food when it comes to nourishment, delicate taste, and happiness of mind. Only return the topic.
The world's most beloved food for its nourishment, delicate taste, and happiness of mind.