Baked Cajun Mahi-Mahi Dinner Recipe

Katie Jasiewicz | Katie's Cucina

This Baked Cajun Mahi-Mahi Dinner is a healthy way to get dinner on the table. And it only uses one dish!

It's a new year, which means we all are trying to eat a little healthier. Fish is always a go-to when I'm trying to eat healthy.

I also always keep fish in my freezer as an easy go-to meal. Mahi-mahi season is over here in Florida; however, my freezer still has quite a few filets left from a successful fishing season.

Baked Cajun Mahi-Mahi Dinner Photo

We enjoy mahi every other week for dinner. I almost always prepare it with Cajun seasoning and serve with rice, quinoa, or my favorite, couscous.

I like to make fish either on a Friday or Saturday night. It's a simple meal to make and since we never have leftovers it's perfect for the weekend.

Baked Cajun Mahi-Mahi Dinner Picture

We love to eat leftovers for lunch throughout the week, and let's face it--who likes to eat fish the next day? You also don't want to be known as the "stinky fish person" at work.

That was always one of my biggest pet peeves when I worked in the corporate world. It should be against the law to reheat any form of seafood in the microwave. I digress...

Baked Cajun Mahi-Mahi Dinner Image

If you’re looking for a new way to cook mahi-mahi (or any steak like white fish) then I think you'll love this Cajun style. A trinity mix of red, yellow, and green bell peppers as well as onions and fresh tomatoes are what makes this meal complete.

The Andouille sausage brings a little heat to the topping. If you’re on a low carb diet, you could easily make this without any starchy sides and just roast additional veggies.

Baked Cajun Mahi-Mahi Dinner Pic

Pro tip: dice the tomatoes, bell peppers, onions, and Andouille sausage the night before and store in a sealed container in the refrigerator.

Once you’re ready to make the meal, just pull out the chopped veggies and you've just save a good 15 minutes of dinner prep time.

I also don't worry about thawing the fish. I bake it from frozen and it's completely fine to do just that.

File 1 Baked Cajun Mahi-Mahi Dinner

You can eat the fish, veggies, and sausage just as it is, or serve it on a bed of brown rice or quinoa. I typically throw in a pan of veggies to roast while the fish dinner cooks.

So, if you want to simplify dinner and keep it on the lighter side, I invite you to switch up your dinner routine and make my Baked Cajun Mahi Mahi Dinner tonight!

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Baked Cajun Mahi-Mahi Dinner Recipe

    4 Servings


  • 4 Plum Tomatoes, diced
  • 1/2 Red Bell Pepper, diced
  • 1/2 Green Bell Pepper, diced
  • 1/2 Yellow Bell Pepper, diced
  • 1/2 medium White Onion, minced
  • 2 links Andouille Sausage, diced
  • 3 tablespoons Olive Oil, divided
  • 2 teaspoons Cajun Seasoning, divided
  • 1 frozen fillet Mahi-Mahi, large


  1. Preheat oven to 425°F.
  2. In a 9 x 12 glass-baking dish, place the diced plum tomatoes, bell peppers, onion, and Andouille sausage.
  3. Drizzle one tablespoon of the olive oil and sprinkle one teaspoon of the Cajun seasoning on top.
  4. Mix well and then push to the sides of the dish leaving a large hole for the mahi-mahi.
  5. Drizzle one tablespoon of olive oil on the empty spot in the baking dish. Then add the large frozen mahi-mahi filet to the dish (skin side down).
  6. Drizzle the remaining one tablespoon of olive oil on top and sprinkle the remaining one teaspoon of Cajun seasoning on top of the fish.
  7. Place aluminum foil on top of the glass-baking dish and bake for 25 minutes.
  8. Remove the aluminum foil from the dish and bake for an additional 15 minutes until internal temperature reads 165°F.
  9. Remove from the oven, carefully cut the fish in 3-4 pieces depending on the size of the filet. Place fish on plates and top with tomato, pepper, and sausage mixture. Enjoy immediately.


  • I like to serve this meal with a side of rice or quinoa and roasted asparagus spears.


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Related Recipes:
One Pot Meal Recipes, Easy Dinner Recipes, Seafood Recipes, Fish Recipes, Baked Recipes, Casserole Recipes, Sausage Recipes, Spicy Recipes, Easy Recipes, Tomato Recipes, Pepper Recipes, Onion Recipes, Healthy Eating Recipes
Recipe Yields:
4 servings
Prep Time:
Cook Time:
Total Time:
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Author: Katie Jasiewicz
Recipe Yields: 4 servings
Prep Time: 15 minutes
Cook Time: 40 minutes
Total Time: 55 minutes

Nutrition Facts

Servings Per Recipe 4

Amount Per Serving
Calories from Fat 114
Calories 231

% Daily Value*
Total Fat 14g
  Saturated Fat 3g
Sodium 94mg
Total Carbohydrate 6g
  Dietary Fiber 1g
  Sugars 3g
Protein 16g

* Percent Daily Value are based on a 2,000 calorie diet. Your daily values may be higher or lower depending on your calorie needs.
** Nutrition Facts are estimated based on ingredients and data provided by Fat Secret. Please consult a doctor if you have special dietary needs.
Katie Jasiewicz

About Katie

Katie is our resident one-pot meal fanatic, but you'll find that she's passionate about every kind of food, from dinners to desserts, on her blog Katie's Cucina.

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