If food is a metaphor for a blanket, then cover up with this. Melty, cheesy stuffed pasta shells, smothered in a bright tomato sauce—and, of course, more cheese—are exactly what we need right now. This is a dish that will please everyone, no matter their age, and warm you up when the weather is miserable outside. It takes a little time to assemble, so consider the process a meditative exercise with comforting results. Feel free to perfect the presentation, arranging the shells in tidy rows or spirals, if you like. But remember that the shells will be blanketed with sauce and cheese, so there is absolutely no need to be meticulous—unless that’s how you roll. A meal like this is warming and satisfying in the winter. It’s also practical, because it can be assembled in advance, and the portions can be doubled to feed a crowd. I’ve provided a simple …