This soup is the perfect, surprisingly simple starter for winter dinners and holiday entertaining. In this video, you’ll learn how to make French onio... See moren soup the easy way. A splash of sherry vinegar and sherry wine are the secret ingredients here. You’ll also learn a few other tricks to make sure you get a delicious, clear broth and melt-in-your-mouth onions. Spoon the soup into individual bowls, top with a slice of baguette bread, sprinkle with Gruyere cheese, and broil to golden brown for an impressive first course that’s also surprisingly easy to make. Get Chef John’s recipe for Easy French Onion Soup.