*If making ahead: Cook the potatoes and prepare the dressing, but refrigerate separately and toss just before serving.
*New potatoes are really nice here, but larger, cut-up potatoes are just as good in this recipe.
*The shallots become a bit more pronounced over time. Slice and add them just before serving if you prefer milder flavors.
*Basil discolors and wilts if sliced or chopped too far in advance. Basil mixed into the dressing will be fine (even overnight), but slice or chop any basil used as garnish just before serving.
*Refrigerate leftovers for up to two days. The dressing may separate a tiny bit, but it’ll still be delicious.
*Recipe adapted from The Kitchn.