Heat oil in a large skillet over medium heat. Add shallots and garlic and saute 1 minute. Add mushrooms and cook 3 to 5 minutes, until mushrooms are tender. Add sherry and soy sauce and bring to a simmer. Add spinach (add spinach in batches if necessary), and simmer 1 to 2 minutes, until spinach wilts, turning frequently.
Recipe courtesy Robin Miller, 2006, All Rights Reserved