I just love those little blue potatoes and this salad is perfect for Fourth of July parties. Trader Joe's sells all three potatoes in one bag. And if you want to jazz it up a bit, add sweet potatoes too! Red, White & Blue Potato Salad is even better at room temperature than cold.
Simmer red, white, and blue potatoes, skins on, in salted water until tender, but not mushy. Let cool until easy enough to handle, but still warm. Cut into 1-inch pieces.
Combine mayonnaise, ranch dressing, champagne vinegar, dill weed, and optional sugar. Pour over warm potatoes and toss to coat. Season with salt and pepper to taste. Refrigerate 2 hours or more to let flavors meld.
Let come to room temperature to serve. Garnish with grape tomatoes. Recipe may be easily doubled.