Trim excess silver skin from the beef cheeks. Season well.
Sear the beef on high heat until deep brown, then place on top of the mirepoix in the pot.
Deglaze the pan with red wine, then add beef stock. Scrape the fond.
Cover and cook at 160°C for 4 hours.
Cool the meat in the stock before shredding.
Dice onions, carrots, celery (Parmentier cut). Finely chop mushrooms (duxelles).
Sweat onions, then add other veg and cook for 5 minutes.
Add shredded beef and stock. Stir in beurre manié and simmer for 15 minutes.
Finish with fresh tarragon and thyme.
Scoop out potatoes and pass through a ricer or drum sieve. Mix with butter, milk, and nutmeg.
Pipe mashed potatoes over the beef mix. Sprinkle cheese.
Bake at 180-200°C for 15-25 minutes until golden.
