Here are just a couple shots from a very excellent photo story from Time,What The World Eats. From the book Hungry Planet.
United States: The Revis family of North Carolina
Food expenditure for one week: $341.98
Favorite foods: spaghetti, potatoes, sesame chicken
Chad: The Aboubakar family of Breidjing Camp
Food expenditure for one week: 685 CFA Francs or $1.23
Favorite foods: soup with fresh sheep meat