→ For the Onion Base
01 -
Large yellow onions - 6, sliced into thin half-moons
02 -
Unsalted butter - 4 tablespoons, cut into chunks
03 -
Good olive oil - 2 tablespoons
04 -
A pinch of sugar to help with caramelization
→ For the Soup
05 -
Fresh garlic - 2 plump cloves, finely minced
06 -
Rich beef broth - 8 cups
07 -
Dry white wine - 1/2 cup
08 -
Fresh thyme sprigs - 4
09 -
Bay leaves - 2
10 -
Sea salt and freshly ground pepper
→ For the Topping
11 -
Fresh French baguette - 1, cut into thick slices
12 -
Gruyère cheese - 2 cups, freshly grated
13 -
Parmesan cheese - 1/2 cup, freshly grated