Chex mix, or “nuts and bolts” as we always called it, can be a big holiday project — but it can also be an anytime, year-round treat — Each year on Thanksgiving, my parents’ house was packed with various family members, and as some of us sat in the living room watching parades or football, we passed the time cracking nuts. After the holiday, Mom would have to take the vacuum hose to the sofa and chairs to…