INGREDIENTS
4 tbsp
butter
5 larges
onions
1 tsp
salt
1 tsp
granulated sugar
2 cloves
garlic
1/2 cup
red wine
32 oz
beef broth
24 oz
chicken broth
1 tbsp
worcestershire sauce
2 sprigs
thyme
1
bay leaf
1/2 tbsp
balsamic vinegar
1 pinch
salt and pepper
5 slices
bread
2 tbsp
olive oil
1 1/2 cups
gruyere swiss cheese
1/4 cup
mozzarella cheese
2 tbsp
parmesan cheese