A bowl of rich onion soup, steaming, delicious looking brown broth, a thick layer of melted slightly broiled gruyere cheese on top, a beautifully toasted piece of bread on the right of bowl, a restaurant blackboard sign in the background reading "Soup du jour: Soupe à l'Oignon Gratinée" relaxing atmosphere, Photorealistic, Highly detailed, masterpiece, 4k, high resulution, great lighting, depth of field,