Generally I'm not one for "themed" food. But a girl's gotta have some fun. So for the 4th of July, I'd like to share a patriotic potato salad made with three kinds of spuds: old fashioned white russet, delicate red-skinned taters, and sassy All-Blue potatoes (which are sometimes labeled purple Peruvian).
This potato salad is just kitschy enough without being tacky. Though I recommend using red-white-and-blue checkered cloths, I don't think sticking sparklers or miniature American flags in the potatoes is necessary.
The potatoes you see here are called All-Blues. They are slightly starchier but the same color as purple Peruvians, which are technically fingerling potatoes -- smaller, thinner potatoes. Apparently, both get their brilliant color from iron. The color will fade when cooked, but try this trick to minimize the fading: add a couple of splashes of white vinegar to the cooking water.