1
Adjust rack to top position (top and middle positions for 4 servings) and preheat oven to 425 degrees. Lightly oil a baking sheet. Wash and dry produce.
Trim and quarter sweet potato lengthwise; cut into ½-inch-thick pieces. Peel and mince or grate ginger. Trim green beans if necessary. Trim and cut scallions into 1-inch pieces.
In a large bowl, soak panko with 2 TBSP water (4 TBSP for 4); let stand until absorbed (you’ll use in the next step).