The French put a variety of ingredients on their sandwiches, including cheese, ham, chicken, lettuce, tomatoes, pickles, mustard, mayonnaise, and sometimes even fries or a fried egg. Baguettes are commonly used as the bread for sandwiches in France, and they are often toasted or pressed in a panini press. Regional specialties can also be found, such as the croque-monsieur, a hot ham and cheese sandwich, or the Pan Bagnat from Nice, which is a sandwich made with tuna, red onion, tomatoes, hard-boiled egg, and olives on a round bread known as a “pain de campagne.”