Season 3 lamb shanks and sear in the casserole pot until browned, then set aside
Caramelize 3 halved shallots and remove from pot
Sauté 2 diced carrots, 1 diced onion, 2 diced celery stalks, and 2 tbsp tomato paste
Deglaze with 500ml red wine
Add 500ml chicken stock, garlic bulb, herbs, and peppercorns
Return shanks to pot, cover, and cook in oven at 140°C for 3.5 hours
Uncover and cook for additional 45 minutes
Strain the liquid and reduce to a silky sauce
Stir in 50g butter and season to taste
Baste the shanks in sauce
For mint sauce: steep 30g chopped mint in boiling water for 3 minutes
Refresh mint in cold water and drain, reserving 1 tbsp liquid
Mix 1 tbsp reserved liquid, 2 tbsp cider vinegar, 2 tsp sugar, and a pinch of salt
Add mint to mixture and let sit for 30 minutes
Serve lamb shanks with red wine sauce and mint sauce alongside mashed potatoes
