I usually eat them stir-fried, tsukudani (boiled in soy sauce ), or cook with egg. This time, I tried mixing them into the Korean-style pancake, Buchimgae (not sweet pancakes). Their texture was like mini bamboo shoots. I liked it! It was good with the spicy sauce. Yes, as you said, horsetails are super medicinal. You can also make tea after they grow and change their color to green.