INGREDIENTS
1
baguette, cut on diagonal into 1/2-inch slices
3 tbsp
olive oil, divided
3
large yellow onions, peeled and sliced thinly into semicircles
1 tbsp
brown sugar
1/2 cup
water, divided
1 tbsp
balsamic vinegar
1/2 tsp
kosher salt
1 tbsp
minced fresh sage
3 oz
Pecorino Romano cheese