This onion-stuffed pork tenderloin is a delicious and elegant dish that is perfect for special occasions or a fancy dinner at home. The tender pork is filled with a flavorful mixture of onions, garlic, and herbs, which adds a burst of flavor to every bite. The chutney-mustard sauce complements the pork perfectly, adding a tangy and slightly sweet element to the dish. Serve this dish with roasted vegetables or mashed potatoes for a complete and satisfying meal.