Vegetarian French Onion Soup With Mushrooms Recipe
Ingredients 3/4 stick unsalted butter 2 large onions, peeled, halved, and thinly sliced (about 4 cups) 2 bunches scallions, white and light-green parts coarsely chopped (about 3/4 cup), dark-green tops thinly sliced 4 sprigs thyme, plus leaves for serving 1 dried bay leaf 12 ounces cremini mushrooms, coarsely chopped Coarse salt and freshly ground pepper 4 1 1/4-inch-thick slices sourdough bread 1 1/2 cups shredded Gruyere (about 4 ounces) Preparation Melt butter in a medium pot over medium-high heat....