I didn't grow up with peanut butter and I didn't even think I liked it all that much until relatively recently. First there were Peanut Butter Cups and Reese's Pieces then there was the 2007 Edinburgh Moonwalk. Four of us were walking together and on our 20 mile training walk Glenys pulled out peanut butter sandwiches when we got hungry. The perfect mid walk combination of protein and carbs it…