French Onion Soup - cooking recipe

Ingredients

4 c. thinly sliced onion
1/4 c. melted butter
2 Tbsp. flour
2 (10 1/2 oz.) cans beef broth
1 (10 1/2 oz.) can chicken broth
1 broth can water
puffy cheese croutons

Preparation

Saute onion in butter until limp; blend in flour. Add broths and water. Simmer for 30 minutes. Serve with croutons. Garnish with shredded Mozzarella cheese if desired.