Adapted from Jenny Rosenstrach’s new book How to Celebrate Everything, every sentence of which I am relishing — seriously, I don’t want it to end. In addition to this delicious sandwich, which I’ve been making almost every night, I’ve also made the German potato salad and the crispy chickpeas, both of which were also delicious. Note: So, you know the trick of spreading mayonnaise on bread destined for the griddle or grill pan, right? Mayonnaise doesn’t burn as quickly as butter, so the bread bronzes at a nice rate, right in sync with the melting of the cheese. The trouble, I find, is that mayonnaise doesn’t give you that butter flavor. But if you use a mix of butter and mayonnaise, you get the best of both worlds. You, of course, can use all butter (or mayonnaise) if you prefer.