Peel, wash and cut the potatoes into large pieces. Covered in salt water approx.
Cook for 20 minutes. Peel and slice the onions. Wash and clean the mangetouts and cut lengthwise into strips.
Pat the steaks dry. Heat the oil in a large pan. Fry the steaks in it for 1-2 minutes on each side. Season with salt and pepper. Switch down to medium heat. Then continue to fry for 3-4 minutes on each side for one pink steak (medium).
Wrap in aluminium foil and let it rest for about 10 minutes.
In the meantime, fry the onion slices in the hot frying fat for about 2 minutes. Deglaze with Teriyaki sauce, bring to the boil, cover and stew for about 3 minutes until translucent. Heat 1 tablespoon butter in a second pan. Fry the sugar snap peas in it for about 5 minutes.
Season with salt and pepper.
For the puree, heat 200 ml milk and 3 tablespoons of butter. Drain the potatoes. Add milk-butter-mix and wasabi and mash everything finely. Season to taste with salt. Wash the coriander, shake dry, chop finely and fold into the puree.
Unroll the steaks and pour the resulting gravy into the sauce. Arrange steaks with onions with sauce, puree and mangetout.