Combine cucumbers with sour cream, yogurt, lemon rind, lemon juice and dill. Mix well and reserve.
Season trout with salt and pepper. Bake fillets in a slightly greased baking pan at 400 °F (200 °C) for 8 to 10 minutes or until cooked. Remove from oven.
Serve with sour cream and cucumber sauce over it.
How to fillet, skin and debone fish