While the soup is simmering, toast the bread and shred the cheese.
Ladle your desired amount of soup into an oven-safe bowl. Top each bowl with toasted bread and a big handful of cheese. Place them on a baking sheet and broil for 3 - 5 minutes, or until the cheese is melted, brown and bubbly.
Serve immediately with a sprinkle of fresh parsley.
Recipe by Slice of Jess at https://sliceofjess.com/seriously-the-best-french-onion-soup-recipe/