What is the smallest set of different crops a (vegan) human population could grow to sustain itself?
We'll assume they have an ideal environment, where anything and everything can grow and the technology to grow aquatic plants. It can be anything from baobab fruits to micro-algaes.
My first list contains soy beans, spirulina, barley, cabbage, bananas, and a few others. It keeps getting longer but I'd like to keep it as short as possible.