Does anyone know how to grow miner's lettuce?

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I love eating these wild greens called miner's lettuce. There is just one problem I am having with it. I don't know how to grow it myself. When I have a craving for them, I would have to make a trip to the mountains to forage it. In the wild, it is very plentiful, but I notice that in the city, can't find them anywhere. How does one get their hands on some seed if that is even how they are grown. Does anyone here have any success growing their own, and how did you do it?