Pork Tenderloin Recipe

Season pork with salt and pepper.

Heat oil and 3 tablespoons butter in a pan over medium-high heat. Sear pork, about 30 seconds to 1 minute per side. Cook pork in batches to avoid overcrowding the pan. Set pork aside.

Sauté onions, garlic, rosemary, and mushrooms in the same pan until mushrooms are cooked, about 2 to 3 minutes.

Add wine and bring to a boil. Reduce heat; simmer until liquid is syrupy, about 2 to 3 minutes.

Add chicken stock and bring to a boil. Season with salt and pepper.

Add remaining butter and whisk well. Return pork to the pan and simmer for 1 to 2 minutes. Garnish with parsley before serving.