Food & Cooking Recipes Appetizers Finger Food Recipes Bistro Sliders with Pickled Onions 3.0 (32) Add your rating & review 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 Servings: 4 These grilled mini burgers are just right for big or small appetites. Ingredients 1 teaspoon olive oil 1 small red onion, thinly sliced Coarse salt and ground pepper 1 teaspoon sugar 2 tablespoons red-wine vinegar 1 garlic clove, minced 3 tablespoons mayonnaise 1 ½ pounds ground beef chuck (80 percent lean) 8 split brioche or soft dinner rolls Directions In a medium skillet, heat olive oil over medium-high. Add onion, and cook until softened, 2 minutes. Season with salt and pepper. Add sugar and vinegar; toss to coat. Let mixture cool. In a small bowl, combine garlic and mayonnaise. Heat a grill to medium-high. Clean and lightly oil hot grill. Divide ground beef into 8 balls. Press each lightly to form 3/4-inch-thick patties. Season each with salt and pepper. Grill 3 minutes per side for medium. Serve sliders on rolls with pickled onions and garlic mayonnaise. Cook's Notes Indoor method: In an oiled grill pan or cast-iron skillet, cook burgers over medium-high. Rate it Print