1
Adjust racks to top and middle positions and preheat oven to 450 degrees. Wash and dry produce.
Halve, core, and thinly slice bell pepper into strips. Peel and dice sweet potato into ½-inch pieces. Halve, peel, and thinly slice onion; mince a few slices until you have 2 TBSP (4 TBSP for 4 servings).