Fric-Frac is a small restaurant in Montmartre that serves croque monsieur and various toasted sandwiches. The croque monsieur options range from the traditional version to variations such as Le Mamzel, Bandito, and Weenie, each accompanied by a small salad. Customers can view the menu, order, and pay through a QR code on the table, and the bread is made in-house with Wi-Fi available. The space is small, so there can be a wait outside at lunch, and the interior is sometimes loud.