Food & Cooking Recipes Appetizers Finger Food Recipes Sweet Onion Sandwiches By Martha Stewart Editors Martha Stewart Editors Facebook Instagram Twitter Website An article attributed to "Martha Stewart Editors" indicates when several writers and editors have contributed to an article over the years. These collaborations allow us to provide you with the most accurate, up-to-date, and comprehensive information available.The Martha Stewart team aims to teach and inspire readers daily with tested-until-perfected recipes, creative DIY projects, and elevated home and entertaining ideas. They are experts in their fields who research, create, and test the best ways to help readers design the life they want. The joy is in the doing. Editorial Guidelines Updated on May 16, 2017 Print Share Share Tweet Pin Email Yield: 4 For this sumptuous sandwich, layer sweet onions with smoked Gouda cheese and arugula on a rustic roll. Ingredients ½ cup mayonnaise 2 tablespoons coarsely chopped fresh flat-leaf parsley ¼ teaspoon coarse salt Freshly ground pepper 4 large rustic rolls, sliced in half 12 ounces smoked Gouda cheese, thinly sliced 1 small sweet onion, thinly sliced 1 bunch arugula, washed and drained Directions In a small bowl, combine mayonnaise and parsley. Season with salt and pepper. Spread 1 tablespoon mayonnaise mixture on each of the halved rolls. Place Gouda on four halves, and top with sliced onion and arugula. Top with remaining halves. Print