01 -
Wash and slice leeks into half-moons. Heat 3 tablespoons clarified butter in a saucepan over medium heat.
02 -
Add leeks to the butter and sauté for 3–4 minutes. Add garlic and cook for 1 minute until fragrant.
03 -
Stir in spinach leaves and chopped parsley until wilted and evenly mixed.
04 -
In another pan, melt 2 tablespoons clarified butter. Whisk in flour and cook for 1–2 minutes, stirring constantly.
05 -
Gradually pour in white wine while whisking to create a smooth, slightly thickened mixture.
06 -
Pour the wine mixture over the vegetables. Stir well and season with salt and pepper. Simmer for 2–3 minutes.
07 -
Transfer the sauce to a baking dish, spreading it evenly to form a base layer.
08 -
Season fish pieces with salt and pepper. Place over the sauce in a single layer.
09 -
Cover the dish with foil and bake at 140°C (285°F) for 40 minutes, or until fish flakes easily.
10 -
Top with lemon slices and fresh parsley before serving.