Steps

1. Slice 200g chicken liver diagonally for even cooking.
   🕒 01:50
2. Finely chop 4 mushrooms.
   🕒 02:11
3. Make deep cuts into 3 slices of beef, approximately 100g each.
   🕒 02:30
4. Heat butter (to taste) in a frying pan. Sauté the chopped chicken liver and mushrooms. Lightly season with salt (to taste).
   🕒 02:41
5. Add garlic (a little) and cook until fragrant, being careful not to burn it.
   🕒 02:59
6. Wipe away excess oil. Add 100cc Marsala Wine and simmer until reduced. Ensure the chicken liver is thoroughly cooked. (Tip: Red wine, port wine, or Madeira wine can be substituted for Marsala wine.)
   🕒 03:21
7. Transfer the reduced chicken liver and mushroom mixture to a bowl and rapidly cool in an ice bath.
   🕒 04:10
8. Coarsely mash the cooled chicken liver and mushroom mixture. (Tip: Avoid making it into a paste; leaving some texture allows you to enjoy the distinct textures and flavors of the chicken liver and mushrooms.)
   🕒 06:00
9. Evenly stuff the coarsely mashed chicken liver and mushroom mixture into the cuts made in the beef, then wrap the beef around it.
   🕒 06:57
10. Season the surface of the beef with salt (to taste).
    🕒 07:45
11. Sear the surface of the beef over high heat until browned. Then, reduce the heat and cook slowly until done in the center.
    🕒 07:53
12. Remove the seared beef from the frying pan.
    🕒 08:46
13. In the same frying pan, add butter (to taste). Sauté the vegetables for the side dish: 1/2 pack shimeji mushrooms, 2 eringi mushrooms, 7 mushrooms, and 4 shiitake mushrooms.
    🕒 08:55
14. Lightly season with salt (to taste). Add walnuts (to taste) and shallots (to taste), and sauté briefly until fragrant.
    🕒 09:33
15. Add parsley (to taste) and mix.
    🕒 09:56
16. Place the seared beef on top of the sautéed mushrooms. Add the meat juices.
    🕒 10:08
17. Cover with foil, turn off the heat, and let it rest for about 2 minutes to finish cooking with residual heat and allow the meat to rest.
    🕒 10:19
18. Finish by sprinkling with pepper (to taste) and serving with lemon (to taste). Enjoy!
    🕒 10:51