Fantastic recipe! Saw a neighbor bring this to a block party, and everyone went bonkers for it!

Ingredients:

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