Earthy shiitake mushrooms and pungent cheese toasts give this soup more heartiness than classic French onion soup. For a light main course option, pair with a salad that's lightly dressed so it doesn't overpower the soup.
1 (14-ounce) can fat-free, less-sodium chicken broth
1 (14-ounce) can fat-free, less-sodium beef broth
1/2 teaspoon salt
1/2 teaspoon freshly ground black pepper
12 (1/2-inch-thick) slices French bread baguette, toasted (about 6 ounces)
1/4 cup (1 ounce) grated Gruyère cheese
1/4 cup (1 ounce) crumbled Gorgonzola
1/2 teaspoon finely chopped fresh thyme
How to Make It
To prepare soup, heat oil in a large Dutch oven over medium-high heat. Add onion to pan; sauté 15 minutes or until almost tender, stirring frequently. Reduce heat to medium-low; cook until deep golden brown (about 40 minutes), stirring occasionally.
Increase heat to medium. Add mushrooms to pan; cook 10 minutes or until mushrooms are tender, stirring frequently. Stir in garlic and thyme sprigs; cook 2 minutes, stirring frequently. Increase heat to medium-high. Add wine to pan; cook 2 minutes or until most of the liquid evaporates. Add broths to pan; bring to a simmer. Reduce heat, and simmer 45 minutes. Stir in salt and pepper. Discard thyme sprigs.
To prepare toasts, preheat broiler.
Arrange bread in a single layer on a baking sheet. Top each bread slice with 1 teaspoon Gruyère and 1 teaspoon Gorgonzola. Broil 2 minutes or until cheese melts. Sprinkle chopped thyme over cheese. Ladle about 1 cup soup into each of 6 bowls; top each serving with 2 toasts.