1. Place racks in middle and upper-middle of oven and heat to 400 degrees. Pierce potatoes all over with a fork, then place on a foil-lined baking sheet. Bake on middle rack until fully tender, about 1 hour. Remove from oven and let sit until cool enough to handle; preheat broiler.
2. Cut potatoes in half lengthwise, then scoop out flesh, leaving a 1/4" border (reserve potato flesh for another use). Brush potatoes all over with oil and sprinkle with salt and pepper; arrange, cut side down, on baking sheet.
3. Transfer baking sheet to upper-middle rack and broil until skins are crisp, about 5 minutes, then flip and continue to broil until flesh is lightly browned, about 5 more minutes. Remove from oven and sprinkle evenly with cheese (if using), then broil until cheese is melted, about 2 minutes.
Source: Hannaford fresh Magazine, January - February 2020