Pork Medallions with Grainy Mustard Sauce

• This was a 5 ingredient super fast recipe to put together - the sauce was fabulous and we served it with cauliflower mash -- a 200 calorie dinner!

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• 1 tablespoon olive oil
• 1 (1-pound) pork tenderloin, cut crosswise into 8 slices
• 1/2 teaspoon kosher salt, divided
• 1/2 teaspoon freshly ground black pepper
• 1 1/2 tablespoons whole-grain Dijon mustard (such as Maille)
• 1 tablespoon unsalted butter
• 1/2 cup unsalted chicken stock (such as Swanson)
• 1 teaspoon all-purpose flour

1. Heat a large skillet over medium-high heat. Add oil to pan; swirl to coat. Gently flatten pork slices using the palm of your hand. Sprinkle pork with 1/4 teaspoon salt and 1/4 teaspoon pepper. Add pork to pan; cook 3 minutes on each side or until desired degree of doneness. Remove pork from pan; keep warm.
2. Add mustard and butter to pan, stirring until butter melts. Add stock and flour to pan, stirring with a whisk. Add remaining 1/4 teaspoon salt and remaining 1/4 teaspoon pepper; bring to a boil. Cook 1 minute or until mixture thickens, scraping pan to loosen browned bits. Serve sauce over pork.