You don’t have to be a nutritionist to understand that the choices Americans make when they eat out are likely to affect their health. After all, food consumed away from home accounted for 42% of U.S. households’ food expenditures in 2009, according to estimates from the U.S. Dept. of Agriculture’s (USDA) Economic Research Service (ERS). ERS research, reported in the March 2011 issue of Amber Waves, a USDA publication, also shows that away-from-home meals and snacks tend to be of lower nutrition…