My husband, in his mid-60s, loves good food and is a great dishwasher. He’s suddenly decided that he should also cook with me—a next-stage-of-life experience. And because it would share something important in my life, not so much that he really wants to cook. Any advice as to how to handle this? Make it a once-a-week meal that includes menu planning? Cook our way through a book? Teach technique? Something out of the box?