Set a steamer basket in a large pot with a lid. Add enough water to come just below the basket and bring to a boil. Place the potatoes in the basket, cover pot, and reduce heat to a simmer. Steam the potatoes until tender, 18 to 20 minutes. Set aside to cool. Whisk together the mayonnaise, vinegar, scallions, tarragon, salt, and pepper in a large bowl. Add the cooled potatoes, tomatoes, and crabmeat and stir gently to combine. Chill well before serving. Season with salt and pepper to taste.
Source:
Janice Newell Bissex, MS, RD & Liz Weiss, MS, RD
Authors, The Moms' Guide to Meal Makeovers
www.MealMakeoverMoms.com