If you find that the middle of the paper is soaked, change it to a new one. After about 2 hours, take out the steak, remove the paper and sprinkle with appropriate amount of sea salt and pepper;
3. Set the oven to 500 degrees, and put the cast iron pot with two ears into the oven. Massage the steak a little, grease both sides, put the pot on the stove, and when a drop of water on the iron pot will steam, put the steak in the pot for 30 seconds on both sides, and then put the cast iron pot at one end of the steak in the preheated oven. Turn off the oven and stew for 5 to 10 minutes;
4. Use this time to marinate steak, blanch asparagus, red pepper and stir-fried mashed potatoes. Slice the steak and plate it.