Preheat oven to 375 degrees F. Put one oven rack on the second level from the top and another rack just below the middle. Wash and dry small potatoes, and poke them once with a fork so they don't explode in the oven. Place potatoes on a rimmed baking sheet (Do not use parchment-- it burns). Bake on the lower rack for 30-45 minutes or until soft. About halfway through cooking, give the pan a few brisk shakes so that the potatoes rotate around. The total time depends on the size of your potatoes and the particulars of your oven.
Make ahead strategy: These potatoes can be baked and smashed earlier on the serving day. Let cool, place on the baking sheet, cover, and park in the refrigerator. An hour before serving, take the potatoes out, and let them rest on the counter. Remove cover and place under the broiler just before serving time.
Variations: it's also fun to add dried herbs, garlic, pepper, or parmesan cheese to these potatoes right before you broil them.