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the practice of germinating seeds (e.g., mung beans, sunflower seeds, etc.) to be eaten raw or cooked1)
It can be a way to get fresh vegetarian food or greens in a van.
The usual process is:
Keeping the jar upside down keeps the sprouts moist but not sitting in moisture.
A full list is [https://en.wikipedia.org/wiki/Sprouting#Suitable_seeds|on wikipedia.]