1
Adjust rack to top position (top and middle positions for 4 servings) and preheat oven to 450 degrees. Wash and dry produce.
Dice potatoes into ½-inch pieces. Core, deseed, and dice green pepper into ½-inch pieces. Halve, peel, and cut half the onion (whole onion for 4) into ½-inch-thick wedges. Zest and quarter lime. Mince cilantro.