 Detroit also has its own style of pizza, a thick-crusted, Sicilian cuisine-influenced, rectangular type called square pizza.Other Detroit foods include zip sauce, served on steaks; the triple-decker Dinty Moore sandwich, corned beef layered with lettuce, tomato and Russian dressing; and a Chinese-American dish called "warr shu gai" or almond boneless chicken.The Detroit area has many large groups of immigrants.