French Onion Soup
["1 qt. beef bouillon (2 cans plus 2 cans water)", "3 c. thinly sliced yellow onions", "1/4 c. butter", "1 1/2 tsp. salt", "1/4 c. sugar", "2 Tbsp. flour", "grated Mozzarella cheese", "grated Parmesan cheese", "croutons or French bread, cut up"]
["Saute onions in butter slowly, covered.", "Cook 15 minutes on low (not browned).", "Add salt, sugar and flour, stir well.", "Put all in crock-pot with bouillon.", "Cook 6 to 8 hours on low or 3 hours on high.", "Place croutons in bowl.", "Add soup.", "Top with grated cheeses.", "Brown a little under broiler."]
["beef bouillon", "onions", "butter", "salt", "sugar", "flour", "Mozzarella cheese", "Parmesan cheese", "croutons"]