Oyster mushrooms are delicious, easy to grow and grow quickly (in under 3 weeks!). A few years ago oyster mushrooms were really difficult to get, but have made a big splash in the food scene. The only problem? They're expensive! 1lb of oyster mushrooms can run you $20, and as is typical of mushrooms, once they're cooked they don't turn into much. So what's the best way to enjoy mushrooms and save money? Grow your own!