Fisherman's Pie

Ingredients

• 1 pound cod fillets , cut into chunks
• 3 tablespoons butter
• 2.5 tablespoons all-purpose flour
• 1.5 cups warm milk , or more as needed
• 1 cup shredded sharp white Cheddar cheese
• 1 , 10 ounce
• 0.5 cups minced onion
• 1 teaspoon salt , or to taste
• 0.5 teaspoons ground black pepper , or to taste
• 1 clove garlic , pressed
• 2 cups mashed potatoes
• 1 cup shredded yellow Cheddar cheese

Instructions

1. 1

   Preheat the oven to 375 degrees F (190 degrees C).

2. 2

   Arrange cod in a single layer in a large baking dish; set aside.

3. 3

   Melt butter in a saucepan over medium-low heat. Whisk in flour, and stir until the mixture becomes paste-like and light golden brown, 2 to 5 minutes.

4. 4

   Gradually whisk warm milk into the flour mixture and bring to a simmer over medium heat. Whisk until the sauce is thick and smooth, about 5 minutes.

5. 5

   Whisk in white Cheddar cheese, then mix onion, spinach, salt, and black pepper into the sauce.

6. 6

   Remove saucepan from heat and stir in garlic. If sauce is too thick, stir in more warm milk, 1 tablespoon at a time.

7. 7

   Pour sauce over fish in baking dish.

8. 8

   Layer mashed potatoes on top.

9. 9

   Bake in the preheated oven for 30 minutes, then sprinkle with yellow Cheddar cheese. Continue baking until fish is easily flaked with a fork, 15 to 20 minutes more.