Traditional toppings include pickled herrings (plain, spiced or curried), slightly sweeter than Dutch or German herrings; thinly sliced cheese in many varieties; sliced cucumber, tomato and boiled eggs; pork liver-paste; dozens of types of cured or processed meat in thin slices, or smoked fish such as salmon; mackerel in tomato sauce; pickled cucumber; boiled egg, and rings of red onion. Mayonnaise mixed with peas, sliced boiled asparagus and diced carrot, called (lit. "Italian salad", so named because the colours match the Italian flag), remoulade or other thick sauces often top the layered open sandwich, which is usually eaten with utensils. It is custom to pass the dish of sliced breads around the table, and then to pass around each dish of toppings, and people help themselves.