Classic French Onion Fondue

CLASSIC FRENCH ONION FONDUE4 c. shredded Gruyere cheese1 T. cornstarch1 T. chopped fresh thyme1 T. butter1 t. olive oil5 c. thinly sliced onions1 c. beef brothSalt/black pepper to taste¾ c. dry sherry¼ c. dry white wineAssorted crusted breads, crackers, veggies…