Steak Diane with creamy mash

Mash potatoes with sour cream and skim milk. Season well and set aside. Heat a frying pan. Brush beef steak with ½ tsp olive oil and cook to your liking. Set aside. Heat ½ tsp olive oil in same pan. Cook garlic until fragrant. Add tomato paste, brandy and Worcestershire sauce and stock and bring to the boil. Add cooking cream and stir until thickened. Top steak with sauce and sprinkle with chives. Serve steak with mashed potato.