French Onion Soup - cooking recipe

Ingredients

1/3 c. vegetable oil
2 lb. onions, thinly sliced (7 c.)
1/4 c. cornstarch
10 c. beef stock
salt and pepper
1 loaf French bread
8 oz. Mozzarella cheese, grated
1/4 c. grated Parmesan cheese

Preparation

Cook onions in vegetable oil at medium heat for 40 minutes. Stir in cornstarch for 2 to 3 minutes.
Remove from heat.