
A creamy and nutritious potato, spinach, and fish casserole that's perfect for a comforting family meal or a special occasion.
Prep
20 min
Cook
40 min
Total
70 min
Servings
6
Difficulty
Medium

Instructions
Preheat your oven
Preheat your oven to 375°F (190°C).
Prepare the potatoes
Boil the sliced potatoes in salted water for about 10 minutes or until just tender. Drain and set aside.
Pro tip: Do not overcook the potatoes as they will continue to cook in the oven.
Cook the spinach
In a large pan, heat olive oil over medium heat. Add minced garlic and sauté for a minute. Add spinach and cook until wilted. Season with salt and pepper.
Pro tip: Spinach will reduce in volume significantly, so don't worry if it looks like a lot at first.
Layer the ingredients
In a greased casserole dish, layer the potatoes, cooked spinach, and fish fillets. Pour the heavy cream over and sprinkle with grated cheese.
Pro tip: Ensure the fish is evenly distributed for consistent cooking.
Bake the casserole
Place the casserole in the oven and bake for 30 minutes until the top is golden and bubbly. Check the fish fillets by inserting a food thermometer into the thickest part; they should reach an internal temperature of 145°F (63°C) and appear opaque and flaky.
Pro tip: Check the fish with a fork to ensure it flakes easily, indicating it's fully cooked.
Rest before serving
Let the casserole rest for 10 minutes before serving to allow the flavours to meld together.
Tips & Tricks
- Use fresh spinach for a vibrant flavour and colour.
- Opt for a firm white fish like cod or haddock.
- Pre-cook the potatoes for a smoother texture in the casserole.
- Let the casserole cool for a few minutes before serving to enhance the flavours.
Frequently Asked Questions
What is gratin de poisson?
Gratin de poisson is a French dish similar to a fish casserole, often baked with a cheese topping.
Can I use frozen spinach?
Yes, you can use frozen spinach. Just make sure to thaw and drain it well before using.
What type of fish is best for this casserole?
Firm white fish like cod or haddock works best in this casserole.
How do I know when the casserole is done?
The casserole is done when the top is golden and the fish flakes easily with a fork.
Can I make this casserole ahead of time?
Yes, you can prepare and assemble the casserole a day in advance and bake it when ready to serve.
Serving Suggestions
Nutrition per serving
450
Calories
30g
Protein
22g
Fat
35g
Carbs
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