Sandwich of the Week: Egg’s Amazing Breakfast TreatWhile the humble egg — gently poached at low temperatures and served in creative ways once reserved for hunks of meat or fish — is having its moment on dinner menus across the city, so too is the even humbler egg sandwich. Witness City Bakery’s new fried-egg-bacon-and-Cato-Corner-cheese brunch biscuit, the “Egg on a Roll” on Prune’s just-debuted lunch menu, and Starbucks’s McDonald’s-inspired line of breakfast sandwiches available throughout the day.