Dry the fish fillets with paper towels and put them on the bottom of a baking sheet (or baking dish). The bottom of the baking sheet can be covered with foil or parchment. We try to cover the entire bottom with fillet fish. Salt and pepper.
Then cut the onions into half rings and put them on the fish. The next layer is to spread the carrots, grated on a coarse grater. And also grated cheese.
Next, make a mesh with mayonnaise or completely cover the cheese.
We put the baking sheet in the oven for 50-60 minutes at a temperature of 180 degrees. Ready fish “under a fur coat” can be sprinkled with freshly chopped herbs to taste.