Season the salmon fillets with salt, pepper, and fish seasoning.
Heat a tablespoon of oil in a large frying pan.
Add the salmon fillets to the hot pan, skin side up. Fry for 5 minutes over medium heat, then flip the fillets and cook for another 5 minutes on the other side.
Carefully remove the salmon fillets from the pan and place them on a clean plate.
In the same, unwashed pan, melt the butter, then add the onion and garlic and sauté for a minute or two. Add the dehydrated tomatoes and sliced mushrooms and cook for another 3-4 minutes, stirring constantly. Usually, dried tomatoes are quite salty, so I recommend adjusting the salt-level of the sauce only at the end. When the mushrooms are done, add the chicken stock and cooking cream, mix well with the remaining ingredients and cover the pan with a lid. Let the sauce simmer for 3-4 minutes over medium heat.
Place the salmon fillets over the sauce and cook for another 2 minutes with the lid on. Turn off the heat and leave the pan covered until ready to serve.
Serve with potatoes and steamed broccoli.
For the grown-ups at the table, salmon loves the company of a dry white wine.