Wild Rice and Mushroom Soup

Name: Wild Rice and Mushroom Soup
Ingredients: 1/4 ounce dried shiitake mushrooms , rinsed; 4 1/4 cups water; 1 sprig fresh thyme; 1 bay leaf; 1 garlic clove , peeled, plus 4 cloves, minced; Salt and pepper; 1/4 teaspoons baking soda; 1 cup wild rice; 4 tablespoons unsalted butter; 1 pound cremini mushrooms , trimmed and sliced 1/4 inch thick; 1 onion , chopped fine; 1 teaspoon tomato paste; 2/3 cup dry sherry; 4 cups low-sodium chicken broth or vegetable broth; 1 tablespoon soy sauce; 1/4 cup cornstarch; 1/2 cup heavy cream; 1/4 cup minced fresh chives; 1/4 teaspoon finely grated lemon zest