Florence Fabricant discusses how Sherry's bitter half is gaining exposure. (Read more about Sherry here). Tara Parker-Pope lists 20 healthy foods that cost under $1. Kerri Conan tells a tale of two snacks, featuring flatbread with leeks, pears and blue cheese. The Times staff investigates Champagne. Mark Bittman offers up 101 simple appetizers prepared in 10 minutes or less and how to make the classic Italian dish Pizzoccheri (buckwheat noodles bathed in butter).