Chicken Breast with Roasted Peppers, Mozzarella, and Spinach-Basil Pesto

We devised this sandwich partly to challenge ourselves. Usually prepared in advance of its use in a sandwich, chicken loses moisture by the time it arrives there. So we looked for a way to keep the chicken moist . . . and we found it. By slowly and gently poaching the chicken, and then storing it in the poaching liquid until it’s used, we lock in the moisture. (Use this trick whenever you’re preparing chicken for a picnic or for use in a salad—the chicken will be moist and delicious, and without oil, to boot. Further, you can use the poaching broth for soup simply by adding more water, some vegetables, and some of the chicken.) We serve this as a pressed sandwich, but it also works well served cold.