Horseradish and mustard beef casserole.

BBC - Food - Recipes : Horseradish and mustard beef casserole:
A kind of stew that is cooked slowly in an oven.
By Mary Berry
From Mary Berry's Absolute Christmas Favourites
Ingredients
3 tbsp sunflower oil
1.5kg braising steak, diced
3 large onions, roughly chopped
6 garlic cloves, crushed or finely chopped
300ml beef stock
50g plain flour
300ml dry white wine
3 tbsp Worcestershire sauce
1 tbsp light muscovado sugar
salt and freshly ground black pepper
500g chestnut mushrooms, halved
3 tbsp Dijon mustard
3 tbsp creamed horseradish sauce
3-4 tbsp double cream (optional)
Preparation method
1. Heat 2 tablespoons of the oil in a deep, heavy-based, flameproof,
lidded casserole over a high heat. Add the beef, in batches if
necessary, and fry for 4-5 minutes, or until browned all over. Remove
the meat from the casserole using a slotted spoon and set aside.
2. Heat the remaining oil in the pan, add the onions and garlic and fry,
stirring well, for 4-5 minutes, or until softened, scraping up any
browned bits from the bottom of the casserole using a wooden
spoon. Stir in the beef stock.
3. In a large bowl, whisk the flour with a little of the wine until smooth,
then gradually pour in the remaining wine, whisking until combined to
a smooth batter with the consistency of double cream.
4. Return the browned beef to the casserole, then pour over the wine
and flour mixture. Bring to the boil, stirring until thickened, then add
the Worcestershire sauce and sugar and season, to taste, with salt
and freshly ground black pepper. Cover the casserole with the lid,
reduce the heat until the mixture is simmering, and simmer very
gently for 2 hours, stirring from time to time (alternatively, cook the
casserole in a low oven).
5. After 2 hours, add the mushrooms, return the mixture to the boil, then
cover again, reduce the heat until the mixture is simmering, and
simmer for a further ½ hour, or until the meat is tender.
6. Mix the mustard, horseradish and double cream (if using) in a bowl
until well combined. Just before serving, stir it into the casserole.