Creamy Mushroom Bisque

Name: Creamy Mushroom Bisque
Cuisine: European, American, Mediterranean, French
Ingredients: small onion, finely chopped (1); mushrooms, sliced (12 ounces); old-fashioned oats (2/3 cup); dried thyme (1/2 teaspoon); bay leaf (1); low-sodium mushroom broth (5 cups); freshly ground black pepper (to taste); dry sherry (2 tbsp.); reduced-sodium soy sauce (2 tsp.); salt (to taste); dairy-free (vegan) parmesan cheese substitute (optional) (to taste)