INGREDIENTS
2
unsalted butter
4
onions
1 pinch
Salt & Pepper
2
thyme
2
white balsamic vinegar
2 cloves
garlic
1/2 cup
beef broth
1
olive oil
4
skinless boneless chicken breasts
2
garlic powder
1
ground thyme
1 cup
gruyere cheese
4
grated parmesan cheese