01 -
Heat the oven to 325°F (160°C). Season the beef with salt and pepper while the oven heats.
02 -
Heat the oil in a large flameproof casserole or Dutch oven over medium-high heat. Brown the beef in batches until well colored on all sides, then transfer it to a plate.
03 -
Add the onions and mushrooms to the same pot. Cook for 3-4 minutes, stirring now and then, until they start to soften and pick up the browned bits.
04 -
In a bowl, whisk the Dijon mustard, curry powder, brown sugar, Worcestershire sauce, flour, and about 1/3 cup (75 ml) of the beef stock until smooth.
05 -
Pour the remaining stock into the pot and bring it to a simmer. Whisk in the mustard mixture and cook for 1-2 minutes until the sauce thickens lightly.
06 -
Return the beef and any resting juices to the pot. Cover and transfer to the oven for 2 to 2 1/2 hours, until the beef is tender when pierced with a fork.
07 -
While the beef finishes cooking, simmer the carrots in salted water for 5-7 minutes until just tender. Drain and cool under cold water.
08 -
Bring the casserole back to a gentle simmer on the hob. Stir in the carrots and heat for a few minutes. Taste for seasoning, scatter with parsley if using, and serve hot.