Instructions

1. Begin by preheating your oven to 375°F (190°C). This will ensure that your fish pie cooks evenly and thoroughly.
2. Prepare your ingredients: chop the onion, dice the carrots, and measure out the frozen peas. Set aside.
3. In a large skillet or saucepan, heat the olive oil over medium heat. Once hot, add the chopped onion and sauté for about 3-4 minutes until it becomes translucent.
4. Add the diced carrots to the skillet and continue to sauté for an additional 5 minutes, stirring occasionally, until the carrots are slightly softened.
5. Sprinkle the flour over the cooked vegetables and stir well to combine. This will help thicken the sauce later.
6. Gradually pour in the dairy-free milk while stirring continuously to prevent lumps from forming. Cook for about 2-3 minutes until the mixture begins to thicken.
7. Add the thyme, salt, and pepper to the mixture, adjusting the seasoning to your taste. Then, gently fold in the white fish fillets and frozen peas, ensuring that the fish is evenly coated with the sauce.
8. Once the fish is incorporated, transfer the mixture into a baking dish, spreading it out evenly.
9. Prepare your mashed potatoes according to your preferred recipe, ensuring they are creamy and well-seasoned. Spoon the mashed potatoes over the fish mixture, spreading them out evenly to cover the filling completely.
10. Using a fork, create some texture on the surface of the mashed potatoes. This will help them brown nicely in the oven.
11. Place the baking dish in the preheated oven and bake for 25-30 minutes, or until the top is golden brown and the filling is bubbling around the edges.
12. Once cooked, remove the fish pie from the oven and let it sit for about 5-10 minutes before serving. This will allow the filling to set slightly.
13. Serve the dairy-free fish pie warm, garnished with fresh herbs if desired. Enjoy your hearty and comforting meal!