Food & Cooking Recipes Breakfast & Brunch Recipes Potato and Onion Cakes 3.2 (29) 5 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 18, 2018 Print Rate It Share Share Tweet Pin Email Photo: Joseph Scafuro Yield: 6 These plump little cakes -- grated potatoes with herbs, plus a red onion crown -- are baked in a muffin tin until crisp on the outside and tender on the inside. They can be served with broiled or grilled meats and are also delicious served with eggs for breakfast or brunch. So make some extras; you'll be glad there are leftovers. Ingredients 2 tablespoons unsalted butter, room temperature, plus more for tin Coarse salt and freshly ground pepper 3 teaspoons packed dark-brown sugar 3 teaspoons balsamic vinegar 3 teaspoons red-wine vinegar 1 ½ teaspoons finely chopped fresh rosemary, plus tops of 6 sprigs 1 small red onion, sliced into six ¼-inch thick rounds 2 medium Yukon Gold potatoes (about 1 pound), scrubbed 1 large egg yolk, lightly beaten Directions Preheat oven to 400 degrees. Generously butter six cups of a large (6-cup capacity) muffin tin. Sprinkle each cup with salt, pepper, and 1/2 teaspoon sugar; drizzle with 1/2 teaspoon each balsamic and red-wine vinegar. Add a rosemary top to each cup; cover with an onion slice. Set aside. Using a mandoline, slice potatoes into matchsticks. In a medium bowl, toss potatoes with chopped rosemary and egg yolk; season with salt and pepper. Divide among cups; dot each with butter. Bake until potatoes are tender and edges are browned, about 30 minutes. Run a thin knife around inside of cups to loosen; invert cakes, and serve. Rate it Print