Everyone at Diana's knows that time is of the essence for the downtown lunch bunch, and they work like champs to deliver. One minute from order to plate -- that seems to be the average since Vic and Diana Katopodis took over the Economy Greek Market four years ago and made it entirely their own. Everything here is short-order, counter-served and available to eat in or take out. Whether you go for a cold sandwich, a double chili cheeseburger, a fantastic gyros sandwich with tzatziki, a chicken-fried steak, the best Greek breakfast burrito in the city (called a breakfast pita here, and served only until 11 a.m.) or just a terrific bowl of avgolemono, this tiny deli turns out a great quick lunch.