Favoreats
Favoreats LLC
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INGREDIENTS
3 tbsp
butter
3
onions, peeled and thinly sliced
2 cloves
garlic, chopped
3
sprigs fresh thyme, leaves only
1 tbsp
sugar
1 tsp
kosher salt
1 tsp
black pepper
1 tbsp
white balsamic vinegar
4
French rolls, split in half
2 cups
Gruyère or Fontina cheese, shredded