1 kgYellow Onions - Thinly Sliced
3 clovesGarlic - Minced
4 tbspUnsalted Butter (Substitute With Olive Oil)
2 tbspAll-purpose Flour
8 cupsBeef or Vegetable Broth
1 cupDry White Wine (Substitute With White Wine Vinegar)
1 tspThyme - Dried
Salt and Black Pepper to Taste
Baguette Slices (Substitute With Sourdough Bread Slices )
Gruyere Cheese (Substitute With Parmesan) for Topping