Ingredients
Method
1.Boil, steam or microwave potato until tender; drain. Mash potato with sour cream and milk in large bowl until smooth; stir in horseradish cream.
2.Meanwhile, slice beef into four equal pieces. Cook in heated oiled grill pan until browned and cooked as desired. Cover; stand 5 minutes.
3.Combine wine, stock and mustard in medium saucepan; bring to the boil. Reduce heat; simmer, uncovered, until sauce reduces by half.
4.Serve beef topped with sauce, accompanied by mash and, if desired, steamed asparagus.