- STEP 1
Whizz the mushrooms into a fine powder in a small food processor or coffee grinder. Mix with a good pinch of salt, pepper and the thyme leaves. Rub the mixture all over the steaks, then pop onto a plate or into a sealable kitchen bag and chill overnight.
- STEP 2
Brush away any excess mixture. Heat a griddle pan until smoking hot. Turn the heat to medium, then smear a little olive oil over one side of each steak. Griddle, oiled side down, for 3 mins. Turn over (there’s no need to oil the other side), then cook for another 2 mins for medium-rare. Serve with a baked potato and a wintery salad.