Ingredients Meat & Poultry Chicken Chicken Breast Recipes Grilled Chicken Sandwiches with Mustard 3.9 (22) 3 Reviews 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 Rate It Share Share Tweet Pin Email Prep Time: 5 mins Total Time: 55 mins Yield: 4 This flavorful departure from the usual sandwiches requires little work. It's a cinch to assemble the rest of your meal while this chicken in marinating. Ingredients ¼ cup plus 3 tablespoons whole-grain mustard ½ cup extra-virgin olive oil ⅓ cup chopped fresh dill 2 garlic cloves, minced (1 tablespoon) Coarse salt and freshly ground pepper 2 chicken cutlets (6 ounces each) 1 large red onion, sliced into ½-inch-thick rounds 3 ounces aged cheddar cheese, thinly sliced 1 baguette, cut crosswise into 4 pieces and halved horizontally 3 tablespoons creme fraiche 3 sour pickles, thinly sliced lengthwise Directions Mix 1/4 cup mustard, the oil, dill, garlic, 1 1/2 teaspoons salt, and 3/4 teaspoon pepper in a medium bowl. Add chicken and onion, and toss to coat. Refrigerate, covered, for 30 minutes. Preheat grill to medium-high. Grill onion, turning often, 8 to 10 minutes. Grill chicken on 1 side for 3 minutes; flip, top with cheddar, and cook 3 minutes more. Cut cutlets in half. Grill baguette, cut sides down, until crisp, 1 to 2 minutes. Mix remaining 3 tablespoons mustard and the creme fraiche in a small bowl. Spread onto cut sides of baguette. Sandwich chicken, pickles, and onion between bread. Rate it Print