Martha Stewart on Instagram: "There’s nothing like French onion soup on a cold day, and thankfully, this bistro classic is easy to make at home. We use sweet Vidalia onions and cook them slowly so they caramelize—that’s the key to this recipe. Serve the soup in ovenproof bowls so you can broil the Gruyère-topped toast in each portion, just like they do in Paris. Get the recipe at the link in our bio."