French Onion Soup - cooking recipe

Ingredients

3 to 4 large onions
1/2 c. butter
4 c. water
1/2 tsp. salt (optional)
4 slices French bread
Mozzarella and Swiss cheese

Preparation

Cook onions in butter in frypan for 15 minutes.
Place onions in crock-pot with water and salt.
Cook on high for 3 hours.
Put a slice of French bread into each of 4 ovenproof bowls.
Pour soup on top.
Cover with slices of Mozzarella and Swiss cheese.
Broil in oven until cheese melts.
Serves 4.