Slow Cooker French Onion Soup - National Onion Association

Ingredients

• 2 pounds yellow onions, trimmed, halved and sliced (2 quarts)
• 1 box (32 ounces) beef broth, less-sodium version if desired (1 quart)
• 2 teaspoons dried thyme
• 1/2 cup white wine or water
• 2 tablespoons flour
• 6 thick slices sour dough bread or rustic loaf, crusts trimmed
• 1/2 cup grated Parmesan or Swiss cheese
• Cracked pepper (optional)