👨‍🍳 निर्देश

1. 1

   Preheat oven to 190°C (375°F). Butter a large gratin dish or ovenproof skillet.

   💡 पेशेवर सुझाव: Ensure the dish is well-greased to prevent sticking.
2. 2

   Melt butter in a saucepan over medium heat. Whisk in flour to form a roux and cook for 1-2 minutes, stirring constantly.

3. 3

   Gradually whisk in the warm milk until the sauce is smooth and thickened. Stir in the heavy cream, chopped dill, chives, and lemon zest.

   💡 पेशेवर सुझाव: Whisk continuously to avoid lumps.
4. 4

   Season the sauce with salt and white pepper to taste. Gently fold in the fish chunks and sliced potatoes, ensuring they are coated in the sauce.

   💡 पेशेवर सुझाव: Be careful not to break up the fish too much.
5. 5

   Pour the mixture into the prepared gratin dish, spreading evenly. If using cheese, sprinkle it over the top.

   💡 पेशेवर सुझाव: Ensure potatoes are mostly submerged in the sauce.
6. 6

   Bake for 40-50 minutes, or until the potatoes are tender and the top is golden brown and bubbling. If the top browns too quickly, loosely tent with foil.

7. 7

   Let the gratin rest for 5-10 minutes before serving. Garnish with extra fresh dill or chives if desired.

   💡 पेशेवर सुझाव: Resting allows the sauce to set, making it easier to serve.