Mushroom Broth

Ingredients

• 1/4 cup vegetable oil
• 1 1/2 pounds white mushrooms, finely chopped
• Reserved Portobello mushroom stems, brushed clean
• 1/2 Spanish onion, coarsely chopped
• 2 teaspoons chopped garlic
• 2 cups dry white wine
• 1/2 cup soy sauce
• 1/2 cup dried mushrooms, such as porcini or shiitake ( 1/2 ounce)
• Pinch of salt
• 1/2 teaspoon herbes de Provence or thyme