United States – hot dogs, ketchup and mustard© WHYBIN\TBWAIt's a fact: food art makes you feel good. A combination of two of life's greatest pleasures, it's a theme we've returned to many times in our Happy Monday column – from Food Art Pairings to Modern Art Desserts. This week's series is the result of a clever promotion for the Sydney International Food Festival by advertising agency WHYBIN\TBWA, who created various national flags using foods native to each country– hot...