Cover the rice in 1/8 l boiling salted water and let it swell at low heat for about 20 minutes
Clean and wash the spinach. Peel and finely dice the onion
Boil up approx. 1/8 l water, stock and lemon juice. Wash the fish, cover and cook for 6-7 minutes
Fry the onion in hot oil. Add the spinach and stew covered for about 5 minutes. Season to taste with salt, pepper and nutmeg
Lift out the fish and keep it warm. Boil up the stock and let it boil down for about 3 minutes. Bind the stock slightly and stir in the cream. Season sauce with salt and pepper. Drain the rice. Arrange everything
When poaching or simmering you can do without any fat at all. Add a little acid (e.g. lemon juice or vinegar) to the stock, then you don't have to acidify the fish before