The Asian-sandwich trend gathers significant steam with Xie Xie (Mandarin for “thank you”), a collaboration between chef Angelo Sosa and the folks behind Trattoria Dopo Teatro, Cascina, and Zanzibar. The peripatetic Sosa, best known for the short-lived Yumcha, has crafted a five-sandwich menu with creative combos like shredded braised chicken with smoked egg salad (pictured; $8.50; 645A Ninth Ave., nr. 45th St.; 212-265-2975).