Among the regional foods associated with Philadelphia are cheesesteaks, hoagie, soft pretzels, Italian water ice, Irish potato candy, scrapple, Tastykake, and strombolis. In Pittsburgh, tomato ketchup was improved by Henry John Heinz from 1876 to the early 20th century. Famous to a lesser extent than Heinz ketchup is the Pittsburgh's Primanti Brothers Restaurant sandwiches, pierogies, and city chicken. Outside of Scranton, in Old Forge there are dozens of Italian restaurants specializing in pizza made unique by thick, light crust and American cheese. Erie also has its share of unique foods, including Greek sauce and sponge candy. Sauerkraut along with pork and mashed potatoes is a common meal on New Year's Day in Pennsylvania.