Generously grease a non-stick baking dish.
I usually use either my Pyrex glass dish or one of my Dutch ovens.
Season the chicken breasts with salt and pepper, then place them in the dish.
Cover with aluminum foil and bake at 180°C (350°F) for about 25–30 minutes.
Once the time is up, remove the dish from the oven, take off the foil, and pierce the chicken with a fork to check that it’s fully cooked.
If it is, carefully pour off most of the liquid released by the chicken, leaving just a small amount in the bottom of the dish.
Spread the sour cream evenly over the chicken, then sprinkle with the grated cheese.
Return to the oven until the cheese melts on top.
You can leave it in a bit longer if you like the cheese lightly browned — it’s really a matter of personal preference.