Mushroom Ragu - Lidia

Name: Mushroom Ragu - Lidia
Cuisine: European, Italian, Mediterranean
Ingredients: 2-1/2 pounds small firm fresh mixed mushrooms; 1/2 ounce dried porcini (about 1/2 cup loosely packed pieces), soaked in 1-1/2 cups warm water for a few minutes until reconstituted; 3 sprigs fresh thyme; 1 sprig fresh rosemary, a tender stem about 4-inches long; 1 sprig of fresh sage with 4 big leaves (or more smaller ones); ¼ cup extra-virgin olive oil; 4 tablespoons butter; 1 cup finely chopped shallots; 1 medium onion, finely chopped (about 1 cup); 1/2 teaspoon salt plus more to taste; 1/3 cup tomato paste; 1 cup dry Marsala; 4 cups hot turkey stock or vegetable stock; Freshly ground black pepper