Cook the rice in salted water for about 20 minutes. Wash fish briefly, cut into strips, sour and salt. Heat wine and a little water and steam the fish at low heat for about 10 minutes.
Sort the spinach, wash thoroughly and drain. Clean and wash mushrooms. Peel and chop onions and fry them in 10 g fat. Fry the mushrooms in the remaining fat, deglaze with sparkling wine. Take out mushrooms, pour on cream, let sauce boil down and season.
Add mushrooms. Add spinach, let it collapse and season with salt and pepper. Drain the rice and let it drain. Divide rice and spinach into 4 plates. Drain the salmon, decorate with lemon rasp and put it on the prepared plates with the mushrooms and sauce.