YIELD: 4 to 6 servings | PREP TIME: 20 minutes | STOVETOP: 20 minutes • 2 tablespoons ghee or unsalted butter • 2 tablespoons extra-virgin olive oil • 1 cup chopped shallots (about 2 large) • 2 tablespoons arrowroot starch • 1 pound button mushrooms, roughly chopped •...
