Food & Cooking Recipes Breakfast & Brunch Recipes Potato-and-Onion Frittata 3.0 (61) 3 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 January 23, 2018 Print Rate It Share Share Tweet Pin Email Servings: 8 This easy-to-make potato and onion frittata is a delicious addition to any breakfast or brunch menu. Ingredients ¾ pound small yellow potatoes (such as fingerlings), thinly sliced crosswise 2 teaspoons coarse salt ½ cup extra-virgin olive oil 1 tablespoon unsalted butter 1 large onion, cut into ¼-inch pieces 18 large eggs ½ teaspoon freshly ground pepper ¼ cup flat-leaf parsley, roughly chopped, optional Directions Preheat oven to 425 degrees. In a medium saucepan, combine potatoes and 1 teaspoon salt. Add water to cover. Bring to a boil over high heat. Cook until potatoes are tender, about 15 minutes. Drain, and set aside. In a large ovenproof nonstick skillet, heat oil and butter over medium heat. Add onions, and cook until translucent, about 5 minutes. Add potatoes, and cook for 5 minutes more. In a large bowl, whisk together eggs, the remaining teaspoon of salt, and pepper. Add parsley, if desired. Add egg mixture to skillet, and cook, drawing eggs away from the sides and bottom of the pan with a heatproof spatula so that the uncooked egg runs underneath. When the mixture is loosely set around the edges, place pan in the oven, and bake until puffed and completely set, about 20 minutes. Remove pan from the oven and slide out onto a serving plate. Rate it Print