Recipes Ingredients Meat & Poultry Pork Recipes Pork Tenderloin Sandwiches 3.9 (8) 1 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 March 21, 2018 Print Rate It Share Share Tweet Pin Email Servings: 8 Ingredients 2 teaspoons vegetable oil 1 ½ teaspoons coarse salt 1 teaspoon dried oregano, crumbled ¾ teaspoon ground coriander ½ teaspoon freshly ground pepper 2 pork tenderloins (¾ pound each) ⅔ cup balsamic vinegar 2 tablespoons packed light-brown sugar 8 rolls (3-inches in diameter) 4 teaspoons Dijon mustard 1 medium red onion, cut into thin rounds Directions Preheat oven to 450 degrees. Lightly oil a 9-by-13-inch roasting pan. On a sheet of parchment paper, combine salt, oregano, coriander, and pepper. Working with one tenderloin at a time, roll to coat with spices. Transfer to prepared pan. In a small saucepan, bring vinegar and sugar to a boil. Cook, stirring occasionally, until mixture is syrupy and reduced to 1/2 cup, about 3 minutes. Remove from heat. Roast the pork for 5 minutes. Brush all over with 1/3 of the balsamic reduction. Roast 5 minutes more, and brush with remaining balsamic mixture. Roast until the temperature registers 155 degrees on an instant-read thermometer, about 10 minutes more. Remove from pan. Let rest 10 minutes before slicing. Split the rolls, and brush 1/2 teaspoon of the mustard over each side. Place meat on rolls and top with onion. Replace the tops, and serve immediately. Rate it Print