Today is National Peanut Butter and Jelly Day. Although I ate them frequently when I was still in school, now I have a peanut butter and jelly sandwich maybe once a year. I don't what it is about this classic all American sandwich combination but it optimizes the school lunch. My mom is a preschool teacher and everyday she makes herself a peanut butter and jelly (grape) sandwich. She eats this lunch at school but when she is at home, ...