Food & Cooking Recipes Salad Recipes Roasted Mustard Potatoes 4.0 (11) 2 Reviews By Martha Stewart Test Kitchen Martha Stewart Test Kitchen The recipes developed by our test kitchen team have undergone a rigorous process of development and testing, ensuring that every element is optimal, from ingredient amounts to method and cooking time. This process includes triple-testing recipes to ensure they meet our high standards. The many stellar cooks and food editors who have been part of our team include Sarah Carey, Lucinda Scala Quinn, Jennifer Aaronson, Shira Bocar, Anna Kovel, Greg Lofts, Riley Wofford, Lauren Tyrell, and Lindsay Leopold. Editorial Guidelines Updated on May 16, 2017 Print Rate It Share Share Tweet Pin Email Prep Time: 15 mins Total Time: 1 hrs Servings: 8 This take on potato salad is perfect for a picnic because it doesn't include mayonnaise. Ingredients 3 pounds red potatoes, quartered 5 tablespoons olive oil Coarse salt and ground pepper 3 tablespoons white-wine vinegar 2 tablespoons grainy mustard Directions Preheat oven to 450 degrees. On a nonstick rimmed baking sheet, toss potatoes with 3 tablespoons olive oil; season generously with coarse salt and ground pepper. Turn cut sides down. Bake, turning once, until golden brown and fork-tender, 30 to 45 minutes. In a large bowl, whisk together white-wine vinegar, grainy mustard, and 2 tablespoons olive oil. Add hot potatoes; season with salt and pepper. Toss to coat evenly. Serve warm or at room temperature. Rate it Print