French Onion Soup Casserole

Name: French Onion Soup Casserole
Ingredients: 8 tablespoons (1 stick) unsalted butter, divided; 7 large yellow onions (5 to 5 1/2 pounds total), halved and cut into 1/4-inch-thick slices; 4 large shallots (about 8 ounces), peeled and cut into small dice; 4 teaspoons kosher salt, divided; 1 teaspoon freshly ground black pepper, divided; 6 cloves garlic, minced; 5 stalks celery (about 12 ounces), including leaves, cut into small dice; 5 carrots (about 8 ounces), peeled and cut into small dice; 6 cups cremini and/or button mushrooms (about 1 1/2 pounds), sliced thinly; 1/4 cup all-purpose flour; 1 cup dry Riesling wine; 6 to 8 fresh sage leaves, minced, or 2 teaspoons dried sage; 1 (15-ounce) can white beans and their liquid (optional); 1 large baguette (about 1 pound), cut crosswise into 24 slices; 12 ounces Gruyere, ComtÃ©, or; 4 tablespoons unsalted butter

French Onion Soup Casserole was pinched from <a href="http://www.thekitchn.com/recipe-french-onion-soup-casserole-236489" target="_blank">www.thekitchn.com.</a>

INGREDIENTS

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8 tablespoons (1 stick) unsalted butter, divided

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7 large yellow onions (5 to 5 1/2 pounds total), halved and cut into 1/4-inch-thick slices

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4 large shallots (about 8 ounces), peeled and cut into small dice

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4 teaspoons kosher salt, divided

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1 teaspoon freshly ground black pepper, divided

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6 cloves garlic, minced

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5 stalks celery (about 12 ounces), including leaves, cut into small dice

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5 carrots (about 8 ounces), peeled and cut into small dice

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6 cups cremini and/or button mushrooms (about 1 1/2 pounds), sliced thinly

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1/4 cup all-purpose flour

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1 cup dry Riesling wine

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6 to 8 fresh sage leaves, minced, or 2 teaspoons dried sage

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1 (15-ounce) can white beans and their liquid (optional)

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1 large baguette (about 1 pound), cut crosswise into 24 slices

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4 tablespoons unsalted butter

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