I love to roast just about any vegetable. It is such an easy way to prepare veggies. Today I roasted a mix of cremini and shitake mushrooms. The shitake mushrooms are from the farmer's market so that counts as locally grown (in my quest to be a better consumer) but the creminis are from Washington (not very local).
Drizzle olive oil on the mushrooms, season them with thyme, rosemary and pepper. Then roast them in a 350 degree oven for about 30-40 minutes, until tender. Season with salt when they come out of the oven (if you salt them before they go in, they will lose a lot of their moisture). They cook down quite a bit.