Peel the shallots and thinly slice. Cut the mange-tout and the green beans in half on a diagonal. Pick the fresh herbs.
Make small incisions in the beef and insert a sprig of thyme. Season with salt and piment d'Espelette.
Heat a frying pan to hot with a drizzle of olive oil. Sear the beef for 3 minutes on each side then set aside.
Heat a frying pan and add a knob of butter. Sweat the shallot with a pinch of salt. Cook for 2 minutes and then add the green vegetables. Cover with cold water and cook until all the liquid has evaporated. Adjust the seasoning and then add the walnut oil.
Serve the steaks on a bed of green vegetables and garnish with a sprinkle of fresh herbs.
«An alternative way of cooking the beef would be to seal in a frying pan and then finish for 3 minutes in an oven preheated to 200°C. Feel free to replace the thyme with rosemary.»