This is a true oven-to-table sheet-pan dinner full of tender, crunchy brussels sprouts and crispy, lemony chicken. A simple lemon-and-herb compound butter seasons both the chicken and sprouts, which are then topped with thin lemon slices that become crunchy in the oven, offering a nice textural element and a bright splash of color and flavor. The key is to cut the lemon rounds almost paper-thin, so they can crisp up and lose their bitterness. This recipe is easily adjustable for a larger batch: Add 4 drumsticks (about 1 ½ pounds) to the chicken thighs, increase the butter by 1 tablespoon and adjust seasonings as needed.