Before cooking, you must turn on and preheat the oven to a temperature of 180-190 degrees.
Now let's take care of our salmon. Take a baking dish and grease it with vegetable oil, put our fish fillet here. It is better to take salmon fillet already prepared, so that later you do not take out the bones from the fish.
Now finely chop the spinach, 1 large tomato or 2 small, cut the mushrooms into slices. You can take any mushrooms, but champignons are better, as they cook quickly. Mix everything, add olive oil.
We lay this mixture on top of the salmon filet and send our semi-finished product to the already preheated spirit. We stand there for about 20 minutes, until fully prepared.