This hearty salad is standard French bistro fare. It combines the saltiness and smokiness of bacon, the bite of bitter greens, the crunch of croutons, and the sharpness of mustard vinaigrette. A poached egg is perched on top of the greens, and when broken into, the runny yolk coats all the salad elements like a sauce. This salad makes a great dish for brunch, lunch, or a light dinner alongside a bowl of soup or a sandwich.