INGREDIENTS
3 cloves
Garlic
5
Onions (about 3 lb.), large
6 cups
Vegetable broth, roasted or low-sodium
1 tsp
Dijon mustard
2 tbsp
All-purpose flour
1/2 tsp
Salt
1 tsp
Sherry vinegar
1 tbsp
Vegetable oil
1
6 1/2-inch slices Sourdough bread, toasted
2 tbsp
Butter, unsalted
2/3 cup
Jarlsberg or gruyere cheese
1/3 cup
Sherry, dry