Ingredients 
    
    - 1 kg/2lb 2oz beef fat, roughly chopped
 - 1 garlic bulb
 - 6 sprigs thyme
 - 4 bay leaves
 - 300g/11oz whole ratte potatoes, skin on
 - 4 x 250g/10oz 35 day aged onglet steaks, trimmed
 - 1 tsp olive oil
 - 110g/4oz butter
 - 250g/9oz Scottish girolles, stems scraped and washed to clean any dirt off
 - 250g/9oz trompette mushroom, peeled down and washed of any dirt.
 - 500g/1lb2oz curly kale, stem removed
 
Introduction
A Great British Menu winner, Jason Atherton has had a diverse international career, spanning life in the Army Catering Corps and being an Executive Chef for the Gordon Ramsey Group, before opening restaurants as far afield as Shanghai and Singapore.Method
- Place the beef fat into a sauté pan over a medium heat with the garlic bulb, thyme and bay leaves and cook until melted.
 - Add the potatoes, so they are submerged in the fat, and cook over a gentle heat so the oil just ticks over - at a temperature of less than 100°C/ 200°F.
 - Cook for 20-25 minutes until tender.
 - Remove from the fat and drain onto kitchen paper, before seasoning with salt and black pepper.
 - Season the steaks with salt and a little olive oil
 - Heat a griddle pan to hot, place the steaks on the griddle and cook on each side for 2-3 minutes until medium rare, or longer if desired.
 - Remove and rest for 2 minutes.
 - Heat a frying pan until hot, add half butter and mushrooms and sauté for 2-3 minutes until tender.
 - Bring a saucepan of salted water to the boil, add the curly kale and cook for 2 minutes until just tender then drain.
 - Heat a frying pan until hot, add the remaining butter and kale and sauté for 2 minutes then season with a salt and black pepper.
 
Method for pumpkin jam
- Place the pumpkin into a steamer over a pan of boiling water and cook until tender - 10-15 minutes.
 - Remove and place into a food processor or blender and blitz until totally smooth.
 - Place the cinnamon, nutmeg, cloves and mace into a coffee or spice grinder and blitz to a powder.
 - Place the pureed pumpkin into a saucepan, add the sugar and spices and cook over a low heat until thickened like a jam - about 1¼ -1½ hours.
 - When thickened, remove from the heat, season with salt and black pepper and chill until needed.
 
Method for beef sauce
- Heat a saute or saucepan until hot, add the butter and beef trim and cook until browned.
 - Add 2 of the shallots, garlic, thyme, bay leaf, pepper and pinch of salt and cook for 2-3 minutes until caramelised.
 - Add the brandy and flame to burn off the alcohol and deglaze the pan.
 - Cook until reduced to very little.
 - Deglaze again with the sherry vinegar, cooking down until reduced by 2/3.
 - Add the red wine, and cook until reduced by 2/3, to a glaze.
 - Add the stocks, bring to the boil, then reduce the heat and simmer for 20 to 30 minutes.
 - Strain through a muslin cloth or j cloth into a clean saucepan and return to the heat.
 - Cook until it coats the back of a spoon then pass through the muslin/cloth once more.
 - Season with salt and black pepper before adding the remaining chopped shallot, parsley and capers.
 
To serve
- Cut the steak in half and place in the centre of the plate.
 - Place a spoonful of pumpkin jam either side.
 - Scatter the kale over the top of the steak then place the mushrooms over the top.
 - Place 3-4 potatoes around the plate and finish with a generous ladle of sauce.