Slow Cooker Double French Onion Soup recipes

Name: Slow Cooker Double French Onion Soup recipes
Ingredients: 2 pounds sweet white onions (such as Vidalia), halved and thinly sliced (2 large onions); ¾ pound shallots, thinly sliced (8 to 10 small shallots); 2 thyme sprigs; 1 garlic clove, smashed; 1 bay leaf; 3 tablespoons unsalted butter; ¾ teaspoon kosher salt, plus more to taste; 8 cups low-sodium beef broth; freshly ground black pepper; 1 large baguette, cut into ½-inch-thick slices; 8 ounces Gruyère cheese, thinly sliced or grated