Serves 4 (makes 7 cups)

1 ounce dried porcini mushrooms
2 tablespoons olive oil
2 leeks, halved lengthwise, thinly sliced and rinsed
Coarse salt and ground black pepper
1 garlic clove, minced
1 pound assorted fresh mushrooms, such as white button, cremini, oyster, and shiitake (stemmed), rinsed and chopped
1/2 teaspoon fennel seeds
2 bay leaves
1 tablespoon tomato paste
1 can (14 1/2 ounces) diced tomatoes, drained
1/2 cup marsala wine (optional)
4 cups vegetable broth

Read more at Wholeliving.com: Mixed Mushroom Soup