I prepared this soup a couple of months ago when we were still having some cooler weather. I dearly love a good French Onion Soup but this one is so much more than an Onion soup. It comes from a cookbook of one of my favorite chefs, Lidia Bastianich. This particular cookbook has become one of my favorites.
This soup was outstanding and my new favorite Onion Soup. I used baby portobello's which gave the soup a wonderful flavor. In the directions it says to add salt, my advice is to be very careful about it because the Fontina is salty too. I loved the use of Fontina; I usually use a Gruyere or Mozzarella. Fontina is perfection and another reason this soup was so different. I hope you'll try it; you won't regret it if you love French Onion Soup.Onion Soup with Bread and Fontina Pasticciata4 TABLESPOONS UNSALTED BUTTER
2 TABLESPOONS EXTRA-VIRGIN OLIVE OIL
4 LARGE SWEET ONIONS, THICKLY SLICED
10 OUNCES WHITE MUSHROOMS, SLICED
1 TABLESPOON CHOPPED FRESH THYME LEAVES
KOSHER SALT
FRESHLY GROUND BLACK PEPPER
1/2 CUP DRY WHITE WINE
4 CUPS CHICKEN STOCK, PREFERABLY HOMEMADE, OR LOW-SODIUM STORE-BOUGHT
12 SLICES STALE ITALIAN BREAD, ABOUT 1/2 INCH THICK, FROM A LONG OVAL LOAF
8 OUNCES ITALIAN FONTINA, GRATED
1/4 CUP FRESHLY GRATED GRANA PADANO
Preheat the oven to 425 degrees. Heat the butter and olive oil in a low, wide Dutch oven over medium-low heat. Add the onions, cover, and cook, stirring occasionally, until golden, 15 to 17 minutes. Add the mushrooms. Increase the heat to medium. Cook and stir until the mushrooms and onions are dark golden, about 10 minutes more. Add the thyme, and season with salt and pepper. Add the white wine, and simmer until it’s almost completely reduced, about 2 minutes. Add the stock, and simmer until the onions are very tender and the soup is thick, 12 to 15 minutes.
Toast the bread on the oven rack until just golden, 3 to 4 minutes. Toss the fontina and Grana Padano together in a medium bowl. Set the pieces of bread on top of the soup, starting at the edges, then filling in the middle. Sprinkle with the cheese mixture. Bake in the oven until the cheese is browned and bubbly, about 20 minutes. Spoon the bread and soup into wide soup bowls to serve. This soup can also be poured into individual ramekins, then topped with the bread and cheese and baked.
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