I looked for a recipe online and found one that seemed good, but required sour cream which I didn't have on hand. So I got creative (experimental?).
The dressing consists of lots of grated Parmesan cheese with a teaspoon of lemon juice, some salt and a bit of garlic powder. I mixed it and added some milk to make it pasty. I spread that over the fish in an oven-proof pan. Sprinkled with paprika and covered with a layer of mayonnaise.
In the oven at 350F for about 20 minutes (until the meat breaks easily) and there we are!
Fresh out of the oven
The result was delicious and I definitely will use this again. And the trout was good too! It tasted surprisingly close to salmon.