1
Adjust rack to middle position and preheat oven to 450 degrees. Wash and dry all produce. Cut potatoes into ½-inch-thick wedges. Halve, peel, and thinly slice onion; mince a few slices until you have 2 TBSP (4 TBSP for 4 servings). Zest and quarter lime. Grate 1 clove garlic (2 cloves for 4). Halve buns.