This Lemon Fish Casserole is the perfect dish to enjoy with family and friends. It’s loaded with sweet, juicy lemon slices and fragrant herbs, combined with peppers and cheese for added flavor and texture.

Best of all, it can be prepped in just a few minutes before baking in the oven. The result is an irresistible seafood-based meal that will have everyone asking for seconds!

Lemon Fish Casserole

You might be wondering about the “white fish”…

When it comes to choosing the best white fish for this Lemon Fish Casserole, there are a few options to consider. White fish refers to a wide range of fish species that are typically lean and mild in flavor, making them a versatile choice for various recipes.

Some of the most popular white fish varieties include:

  • cod
  • haddock
  • tilapia
  • halibut
  • pollock

When selecting white fish for this casserole, it’s important to think about texture, flavor, and availability. Cod, for example, is a classic option that is widely available and has a mild, flaky texture that works well in casseroles. Halibut, on the other hand, is slightly firmer with a sweeter taste and is often pricier, but can add a premium touch to the dish.

(For more information on white fish, this is a good source.)

Okay! Let’s get cooking! This Lemon Fish Casserole is sure to become a new favorite!

Ingredients you’ll need:

  • 1 lb. white fish fillets
  • 4–5 slices of lemon
  • Salt and pepper, to taste
  • 1 tbsp. olive oil
  • 2 cloves garlic, minced
  • ½ cup pimento peppers (seet mini peppers), sliced*
  • ¼ cup parsley leaves, finely chopped
  • ⅓ cup grated parmesan cheese (or other hard cheese)
  • 3–4 tbsp. fresh oregano leaves (or thyme/marjoram)

*You can use chopped bell peppers or spicy peppers such as pablano or jalapeno for a spicy kick! (See pepper options below.)

Lemon Fish Casserole with Pimentos

Step-by-Step Instructions for Lemon Fish Casserole:

1. Preheat the oven to 375°F (190°C).

2. Grease a large baking dish with a little bit of olive oil.

3. Rinse the fish fillets under cold running water, pat dry with paper towels and place them in the greased baking dish.

4. Season the fish with salt and pepper to taste.

5. Arrange the lemon slices over the fish fillets covering them completely.

6. In a skillet, heat olive oil over medium-high heat.

7. Add minced garlic and sliced peppers to the skillet and cook for about 3-4 minutes until softened.

8. Turn off the heat and add chopped parsley leaves and oregano leaves (or thyme/marjoram), stirring well to combine.

9. Sprinkle grated parmesan cheese generously over the top of the casserole.

10. Spread the mixture of garlic, peppers, and herbs over / around the lemon slices.

11. Bake the casserole in the preheated oven for 20-25 minutes or until the fish is cooked through and the cheese is bubbling.

12. Once done, remove the casserole from the oven and let it cool for a few minutes.

Serve warm with your favorite side dish, such as roasted vegetables, salad, or garlic bread.

Spicy Pepper Options

If you want to use a spicy pepper in place of the pimento peppers for this recipe, there are a few options to consider.

One of the best types of peppers to use in a fish casserole is the poblano pepper.

Poblano peppers have a mild to moderate level of heat, which can add a nice kick to the dish without overpowering the delicate flavor of the fish. They also have a slightly sweet and smoky taste that pairs well with the lemon and herb flavors in the casserole.

Another option is to use a jalapeño pepper, which has a hotter kick that can add a more intense level of spiciness.

Jalapeños also have a slightly grassy and earthy flavor, which can complement the other savory elements in the dish. Whatever type of spicy pepper you choose, be sure to adjust the amount used based on your personal preference for heat levels. It’s always better to start with a small amount and add more later if needed.

Is it Healthy?

This Lemon Fish Casserole can definitely be considered a healthy dinner option. White fish fillets are low in fat and calories, but high in protein and essential omega-3 fatty acids, which have numerous health benefits, including improved brain function, heart health, and reduced inflammation.

The addition of lemon slices not only enhances the flavor of the dish but also provides a good dose of vitamin C, which is essential for a healthy immune system.

The use of garlic, red bell pepper, and herbs also adds to the health benefits of this dish. Garlic is known for its antibacterial and antifungal properties, while red bell pepper is an excellent source of vitamin C, vitamin A, and potassium.

Fresh herbs, like oregano and parsley, provide antioxidants and other important micronutrients.

Furthermore, the use of olive oil as a cooking oil in this recipe provides healthy fats, which are also essential for our bodies.

Parmesan cheese is high in calcium and protein, which are essential for bone health and muscle growth, respectively. While cheese can be high in fat and sodium, a small amount in moderation can still be part of a healthy diet.

Overall, this Lemon Fish Casserole provides a good balance of healthy macro and micronutrients, making it a wholesome and healthy dinner option. Plus, it tastes delicious, so it’s a win-win for both your taste buds and your health!

Lemon Fish Casserole – Servings

Based on the ingredients listed, this Lemon Fish Casserole recipe makes approximately 4 servings. However, serving sizes may vary depending on individual appetites and dietary preferences.

One serving of this casserole provides a healthy dose of essential omega-3 fatty acids from the white fish fillets, which can help lower inflammation in the body and promote heart health. Additionally, the dish is rich in vitamins C and A from the lemon slices and red bell pepper, respectively.

Enjoy your delicious Lemon Fish Casserole made with love!

(You may also be interested in these fish recipes.)