Soak the dried mushrooms in 100ml water for 1 hour.
Heat 2 tablespoons of oil in a frying pan. Add the steak and fry lightly until brown. Remove the steak and add the onion to the pan. Fry for 6 to 8 minutes until golden. Return the meat to the pan and stir in the flour, garlic, ginger, tomatoes and herbs. Cook for a couple of minutes and then add the dried mushrooms with the liquid, wine, stock, orange rind and sugar. Bring to the boil.
Transfer to a casserole dish, then cover and cook in preheated oven (170°C/150°C fan oven/gas mark 3) for 1½ to 2 hours until the meat is tender. Heat the remaining oil and fry the chestnut mushrooms for 5 minutes. Add to the casserole and cook for a further 15 to 20 minutes.
Serve with mashed potato with a knob of Flora ProActiv Buttery spread. Any leftovers can be frozen for another day.