1
Adjust racks to top and middle positions and preheat oven to 425 degrees. Wash and dry produce.
Cut potatoes into ½-inch-thick wedges. Halve, core, and thinly slice green pepper into strips. Halve, peel, and thinly slice half the onion (whole onion for 4 servings).
Place 2 TBSP butter (4 TBSP for 4) in a small microwave-safe bowl; microwave until just softened, 10-15 seconds. Stir in ¼ tsp garlic powder (½ tsp for 4) and a pinch of salt. (You’ll use the remaining garlic powder in the next step.)