7. Divide the soup into heat-resistant bowls on a baking tray.
8. Top each bowl with a slice of toasted bread and sprinkle with Gruyere cheese.
9. Bake for 20-30 minutes until the cheese melts. Broil for 2-3 minutes until the cheese turns bubbly and brown.
10. Remove, let it cool briefly, and enjoy your French onion soup!
Slow Cooker French Onion Soup is now ready to be enjoyed. The combination of caramelized onions, flavorful broth, and gooey cheese creates a taste sensation that will warm your heart and satisfy your cravings for a comforting meal.