Mushroom Gravy

Ingredients

• 1/4 cup unsalted butter
• 2 cups thinly sliced mushrooms (8 ounces)
• 1/4 cup unbleached flour
• 2-1/2 cups vegetable stock, store-bought or homemade
• 1/4 cup dry red wine
• 2 tablespoons tamari soy sauce
• Freshly ground black pepper