1
Adjust rack to top position (top and middle positions for 4 servings) and preheat oven to 425 degrees. Wash and dry produce.
Place 4 TBSP plain butter (8 TBSP for 4) in a small microwave-safe bowl; bring to room temperature.
Cut potatoes into ½-inch-thick wedges. Trim, peel, and cut carrots on a diagonal into ½-inch-thick pieces.
Trim green beans if necessary or cut broccoli into bite-size pieces if necessary. (Save potatoes for another use.)