I generally roast them in the oven. I place them whole on a baking sheet with the stems pointing up. I use a knife to make sure the membrane around the stems is open, and drizzle them with liquid aminos ( or, you can use soy sauce,) and fill 'em right up. I might add a drop or two of liquid smoke for extra flavor. Bake 'em hot- about 425º- for 25-miutes or so. They come out tender and juicy. I typically bake them at the same time with other foods, like frozen french-fries or vegetables. There's probably a thousand ways you can prepare them, including having them raw. If you buy them packaged whole, be sure to rinse them- they'll likely have little pieces of soil stuck to them. Bon appetit!