Mary Berry's hearty beef casserole dish with horseradish and mustard is simply divine when cooked as instructed by the iconic chef. Served with creamy mash and steamed green vegetables ...
For the casserole: Preheat the oven to 375°F ... For the topping: In a small bowl, stir together the fried onions, potato chips, and parmesan. Sprinkle the mixture evenly over the top of the ...