Simple Grilled Mahi Fish Taco Recipe with Fiesta Ranch Sauce

Mahi Fish Taco Recipe
Dairy Free Grain Free Keto Friendly Kid Friendly Low Carb 

Nutrition: 305 Calories | 5.8g Net Carbs | 18.8g Protein | 21.7g Total Fat

Easy grilled mahi fish taco recipe seasoned with cumin & coriander; and served with tangy slaw, black beans, creamy fiesta ranch, pico de gallo, & avocado.

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Mahi-Mahi, PIco de Gallo, Avocado, Cabbage

Fish taco night is a family favorite around house. Everyone gets really excited. I usually make up a taco bar with all the toppings. I think this is why the kids especially like taco night. They love being able to make their food just how they like it. I usually use tilapia for fish tacos, but it’s fun to switch things up. These grilled mahi-mahi fish tacos are extra special.

Cumin, Coriander, and Mahi Fillets

Season the Mahi-Mahi

Prepping the mahi fillets is really simple. In a bowl combine, ground cumin, ground coriander and salt. Brush the fillets with olive oil and sprinkle with the spice mix. Cumin and coriander are both warm spices that also give the fish some earthy and citrusy flavor. Pre-heat the indoor or outdoor grill. Grilled fish tacos taste great with refried black beans. This recipe is filled with flavor from pico de gallo juice. Start the beans simmering over medium-low heat while the grill is pre-heating.

Mahi-Mahi Fillets

Grill the Mahi

Once your grill is hot, it’s time to start grilling the mahi. On the indoor grill or grill pan, cook the fillets about 6 minutes per side over medium heat. Outdoor grills usually get hotter, so the fish will cook even faster. The fish is ready to turn over when it lifts easily from the grate. If it doesn’t, check it again after 20-30 seconds. Grill the mahi-mahi until it flakes easily with a fork.

Grilled Mahi Fillets, Fiesta Ranch and Coleslaw

Whip Up Some Fiesta Ranch Sauce

A great fish taco always has a delicious creamy sauce. This one is super easy and tasty too. While the fish is grilling, whisk together ranch dressing and some salsa in a bowl. Voilà, creamy fiesta ranch. You can add some heat too if you use medium or hot salsa. This is also a good time to make up the Cilantro Lime Coleslaw. Mix together chopped cabbage with cilantro, lime juice, and mayonnaise (Recipe Here).

Mahi Fish Taco Bar

Set Up a Fish Taco Bar

Add some extra fun to your dinner by settings up a fish taco bar with all the taco elements. Set out the gilled mahi fillets, refried black beans, fiesta ranch, cilantro lime coleslaw, sliced avocado and pico de Gallo,  and let everyone make up their meal. Easy for you; fun for everyone. 

Grilled Mahi-Mahi

Low-Carb Serving Options

Let’s talk about low-carb serving options. The kids love flour tortillas, so that’s what I buy them. My husband and I, however, are always looking for ways to cut out the carbs. There are some great low-carb tortilla options with only 3-5 grams of net carbs. If you want to keep the meal grain-free try cheese wraps (basically tortillas made only of cheese) or a big taco salad. We enjoy all these options.

Mahi Fish Taco Recipe
Mahi Fish Taco Salad

Simple Grilled Mahi Fish Taco Recipe with Fiesta Ranch Sauce

Easy grilled mahi fish taco recipe seasoned with cumin & coriander; and served with tangy slaw, black beans, creamy fiesta ranch, pico de gallo, & avocado.

Total Time: 20 min
Prep Time: 5 min
Cook Time: 15 min



  1. Pre-heat your grill or grill pan over medium heat. Start simmering the black beans over medium-low heat (Recipe Here).

  2. In a bowl mix together the salt, ground cumin, and ground coriander. Brush the mahi filets with olive oil and sprinkle with seasoning mix on both sides. Grill the filets over medium for about 6 minutes on each side until cooked through.

  3. While the fish is cooking, mix together the ranch dressing and salsa. Set the fiesta ranch sauce aside. Prepare the cilantro lime coleslaw (Recipe Here) and slice the avocado.

  4. Once the mahi filets are done cooking, remove from the grill. Build your tacos with cilantro lime coleslaw, refried black beans, pico de gallo, avocado, fiesta ranch and the grilled mahi fillets. Also makes a great taco salad on top of a bed of lettuce. 


Yield: 8 servings, Serving Size: About 3 oz Mahi Filet with toppings (Tortilla not included)

Amount Per Serving:  Calories: 305,  Total Fat: 21.7g, Saturated Fat: 3.5g,  Cholesterol: 70.5mg, Sodium: 861.9mg, Carbohydrates: 9.5g, Fiber 3.7g, Sugars: 2.6g, Protein 18.8g

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