Place rack in top third of oven, add sheet pan + preheat oven to 475°; peel (or don't peel!) potato, cut into ½-inch sticks, mix with 2 tbsp oil + salt/pep; carefully remove hot pan from oven, spread fries onto pan + bake 15 min; flip fries over, reduce heat to 425° + bake 10-15 min more until golden

Meanwhile, preheat oven to 400°, place meatloaf + sauce in a baking dish; bake 20-25 min until warmed through, then slice into 2 pieces

Toast 2 croissants until warm + golden; add a slice of meatloaf + sauce to each croissant + close the lid; serve with fries on the side