Method
1 First make the bourguignon. Heat the oil in a large flameproof casserole dish and add the onions or shallots and the carrots. Fry over a high heat, stirring regularly, until they are dappled with dark-brown patches. Sprinkle over the sugar and continue to cook for another couple of minutes to help caramelise. Remove them from the dish and
set aside.
2 Add the butter to the casserole dish. When it starts to foam, add the mushrooms and cook over a high heat until they have reduced down. Put the onions and carrots back in the dish and season generously with salt and pepper. Add the herbs, then pour in the red wine. Bring to the boil and leave to bubble until the wine has reduced by at least a third. Add the stock, mushroom ketchup and mustard and stir until completely combined.