Ingredients:
3 tablespoons unsalted butter
3 large sweet onions, thinly sliced
2 cloves garlic, minced
Salt and pepper to taste
1 teaspoon thyme (fresh or dried)
2 tablespoons all-purpose flour
1/2 cup dry white wine
2 cups beef broth
1 cup chicken broth
6 slices day-old French bread or baguette, toasted
1 1/2 cups grated Gruyère cheese
1/2 cup grated Parmesan cheese
1/4 cup fresh parsley, chopped (for garnish)
Cooking spray
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