Possible Clues:

• Chain using lots of 2-Down
• "Pizza by the slice" chain
• Fast-food chain founded by Italian immigrants
• Alternative to Uno Chicago Grill
• Fast-food chain whose logo features a modified Italian flag
• Italian eatery chain
• Food-court staple
• Chain that makes a lot of dough
• "Handmade fresh all day" pizza chain
• Pizza chain seen at many airports