Slow Cooker French Onion Soup

Ingredients (13)

• 3 lbs. onions
• 2 tbsp butter
• 2 tsp salt
• 1/4 cup dry sherry
• 2 tsp minced garlic
• 4 cups reduced sodium beef broth
• 2 cups reduced sodium chicken broth
• 5 sprigs fresh thyme
• 1 bay leaf
• 1 tsp sugar
• 1 tsp reduced sodium soy sauce
• 1/4 tsp black pepper
• 6 tbsp parmesan cheese