Steak and potatoes2 kgmashing potatoes, such as Dutch cream or desiree100 gmbutter, softened200 mlpouring cream1.8 kg (about 2) onglet steaks, cut into 6 pieces (see note)50 mlolive oilTo serve:watercress sprigsGreen garlic butter8 clovesgarlic, peeled1 cup (loosely packed) flat-leaf parsley leaves250 gmunsalted butter, softened2spring onions, finely chopped2 tbspfinely chopped French tarragon 2 tbsppastis or other anise-flavoured liqueur
For green garlic butter, combine garlic with a pinch of salt in a mortar and, using a pestle, crush to a paste. Add remaining ingredients and stir to combine. Spoon butter onto a piece of plastic wrap, roll into a cylinder and refrigerate until required. Butter will keep, refrigerated, in an airtight container for up to 2 weeks.
Place potatoes in a large saucepan, cover with cold salted water and bring to the boil over high heat. Cook for 15 minutes or until tender. Drain and peel, press through a potato ricer or mash, then return to saucepan. Add butter and cream and stir over low heat until smooth. Season to taste with sea salt and freshly ground black pepper.
Season steak and set aside. Heat oil in a frying pan over medium-high heat, add steak and cook for 3-4 minutes each side for medium rare or until cooked until your liking. Transfer to a plate, cover with foil and rest for 5 minutes.
To serve, divide potato purée among plates, top with steak and slices of butter and serve with watercress sprigs to the side.
Note Onglet is a cut of beef and is available
from Vic's Premium Quality Meat but may need to be pre-ordered.
Substitute with your favourite cut.