Creamy Fish on Potato Gratin Recipe – A Comforting One-Pan Meal
This Creamy Fish on Potato Gratin is the perfect blend of tender, flaky fish layered over garlicky, buttery potatoes, all baked in a rich, creamy sauce and topped with a golden, crispy parmesan crust. A comforting, one-pan meal that’s both elegant and easy to make!
Ingredients
For the Potato Gratin:
- Unsalted butter – Adds richness and depth.
- Leeks or onions – Mild sweetness to complement the creaminess.
- Garlic – Enhances the flavor with a fragrant touch.
- Starchy potatoes – The base of the gratin becoming soft and creamy as they bake.
- Salt & black pepper – Essential seasonings.
- Dry white wine – Adds a subtle depth of flavor or substitute with more vegetable broth.
- Vegetable stock – Helps tenderize the potatoes and build flavor.
- Heavy cream – The key to that luxuriously creamy sauce.
For the Crunchy Topping:
- Panko breadcrumbs – Creates a light crispy texture.
- Extra virgin olive oil – Helps toast the breadcrumbs to golden perfection.
- Parmesan cheese – Adds an umami salty crunch.
For the Fish:
- White fish fillets – Mild flaky, and perfect for soaking up the rich flavors.
- Salt & pepper – Simple seasonings to enhance the fish.
Instructions
1️⃣ Preheat & Prep:
- Preheat oven to 180°C/350°F (160°C fan).
- Slice potatoes thinly and soak them in water to prevent browning.
2️⃣ Make the Crunchy Topping:
- Mix panko breadcrumbs, parmesan, and olive oil in a bowl. Set aside.
3️⃣ Sauté the Aromatics:
- Melt butter in an ovenproof skillet.
- Add leeks (or onions) and garlic, sautéing for 3 minutes.
4️⃣ Cook the Potatoes:
- Add potatoes, salt, and pepper, cooking for 6 minutes while stirring.
5️⃣ Reduce the Wine & Stock:
- Pour in white wine, simmer until mostly evaporated.
- Add vegetable stock, simmer for 1½ minutes.
6️⃣ Assemble & Bake:
- Turn off heat and place fish fillets on top of the potatoes.
- Pour heavy cream all over.
- Sprinkle panko topping evenly.
- Bake for 30 minutes until bubbling.
7️⃣ Broil for the Perfect Golden Crust:
- Switch oven to broil/grill on high for 4 minutes until topping is golden.
8️⃣ Rest & Serve:
- Let it rest for 5 minutes before serving.
Notes
- Best Potatoes: Use starchy potatoes (Russet or Yukon Gold) for a creamy texture.
- Want More Crunch? Sprinkle extra parmesan before broiling.
- Make It Dairy-Free: Substitute heavy cream with coconut cream.
- Storage: Store leftovers in the fridge for up to 3 days or freeze for up to 2 months.