INGREDIENTS
2 lb
Vidalia onions, sliced
2 lb
boneless, skinless chicken breasts or thighs
2 cups
beef broth
1 cup
swiss cheese, grated
1/3 cup
extra-virgin olive oil, divided
2 tbsp
all-purpose flour
2 tsp
balsamic vinegar
1/2 tsp
dried thyme
1/2 tsp
dried sage
kosher salt and freshly ground pepper,