French Onion Soup
["4 large onions, thinly sliced", "1/4 c. butter", "1 Tbsp. flour", "6 c. beef stock, broth or bouillon", "1/2 tsp. Tabasco sauce", "6 slices toasted French bread (can use croutons)", "3/4 c. shredded Swiss or Gruyere cheese"]
["Cook onions in butter until transparent.", "Add flour; mix well. Place onions in slow cooker.", "Add beef stock and Tabasco.", "Cover; cook on low 8 to 10 hours, or on high heat for 4 to 5 hours. Ladle soup into 6 ovenproof bowls.", "Top each with slice of bread (or croutons); sprinkle with cheese.", "Place in a 350\u00b0 oven until cheese is bubbly.", "Serves 6."]
["onions", "butter", "flour", "beef stock", "Tabasco sauce", "bread", "Swiss"]