1/4 cups canola oil
4 ounces cremini mushrooms (quartered)
4 ounces shiitake (large, quartered)
4 ounces portabello mushroom (gills removed, quartered)
4 ounces white button mushrooms (quartered)
2 cloves garlic (finely chopped)
1/2 small yellow onion (finely chopped)
2 tablespoons chopped parsley (roughly)
2 tablespoons unsalted butter
kosher salt
freshly ground black pepper