Place the beef onto a chopping board, remove all string and flatten out.
Heat olive oil in a large shallow casserole dish and seal the beef on both sides.
Peel and finely shop shallots.
Add shallots to the casserole dish and fry for a few minutes until golden.
In a large jug, mix the remaining ingredients together.
Pour over the beef and bring to a boil. Place the lid onto the casserole and set into a hot oven for 3 hours.
Remove the casserole from the oven and lift the beef to a plate, cover with foil and keep warm.
Set the casserole dish over a high heat and allow to simmer.
until it turns to a thick sauce.
Use two forks to shred the beef and return to the casserole. Mix into the sauce.