A food's value is based on how good it tastes.
Gastronomy has to catch up to the evolution in technology.
Algae is the perfect food plant. It doubles cell mass every twelve hours, depending on the strain.
With a little more tweaking, we could make orange juice in the orange without any packaging or processing.
If you could eat portions of pine trees, you could eliminate corn in many ways.
If you have time-release pills, you could have time-release expanding cheesecakes.