Creamy Mushroom and Swiss Soup

Name: Creamy Mushroom and Swiss Soup
Ingredients: 1/2 cup dried porcini mushrooms; 2 cups boiling water; 1 Fat leek (white and pale green parts) sliced lengthwise and then cut crosswise in 1/4 inch half moons; 1 Clove garlic, minced; 6 tablespoons butter, divided (3/3); 1 teaspoon fresh thyme leaves; 1/4 cup AP flour; 1/2 teaspoon salt; 1/2 teaspoon black pepper; 1 12-ounce bottle light lager; 4 cups chicken broth; 8 ounces Shiitake mushroom caps sliced about 1/4 to 1/3 inch; 1/2 cup heavy cream; 4 ounces Gruyère cheese, finely shredded; Salt and pepper for re-seasoning