Low Carb Tuna Tacos

These low carb tuna tacos are made with fresh ahi tuna steaks, low carb tortillas, and delicious vegetables - all finished with spicy mayo!

This post may contain affiliate links.

I was updating my best low carb fish recipes post the other day and noticed a distinct lack of tuna recipes. In truth, in the UK, fresh tuna is a lot more affordable than where I live in the US, so I've veered more towards salmon, tilapia, and a few others. 

But I thought I should readdress the balance, so here are tuna tacos for you to try! They're seasoned with my homemade Mexican seasoning blend - only three ingredients and SO useful to have on hand.

This recipe obviously relies on low carb tortillas - check out my comparison and review of some great options. The net carb count for these tacos is 6.5g each - based on tortillas with a 4g net carb count. If you wanted to reduce this number so that you can enjoy more than one - consider substituting a lettuce wrap for the tortilla!

How to Make Low Carb Tuna Tacos

Pat the tuna steaks dry with paper towels then sprinkle some Mexican seasoning onto both sides. Heat a grill pan over a medium-high heat and cook the tuna until done to your liking. Let rest.

Meanwhile, assemble the rest of the taco fillings. These taco stands are particularly useful for soft tacos - but if you want to make hard tacos check out my recipe for low carb shrimp tacos.

Add some shredded red cabbage and sliced radishes to low carb tortillas.

Slice the tuna steaks and divide between the tortillas and add some diced avocado.

Finish with a dollop or drizzle of spicy mayo. Here are some options:

• Mayo and hot sauce
• Mayonnaise and chipotle powder
• Mayo and sriracha
• Mayonnaise and adobo sauce

I'd recommend starting with about six tablespoons of mayonnaise and then adding the heat element slowly, tasting regularly. Or you could use store-bought Chipotle Aioli!

Serve immediately!

📖 Recipe

StepAwayFromTheCarbs.com

Low Carb Tuna Tacos

No ratings yet

These tuna tacos are made with fresh ahi tuna steaks, low carb tortillas, and delicious vegetables - all finished with spicy mayo!

Print Recipe Pin Recipe

Prep Time 10 minutes mins

Cook Time 10 minutes mins

Total Time 20 minutes mins

Makes: 6 Tacos

Net Carbs: 6.5

Calories: 280

Ingredients Equipment Method Nutrition Notes

Ingredients

 

US CustomaryMetric

• 2 4 oz fresh ahi tuna steaks (or frozen and thawed)
• 2 teaspoon homemade Mexican seasoning blend
• 6 low carb tortillas
• 1.5 cups shredded red cabbage
• 6 radishes trimmed and sliced into half moons
• 1 avocado peeled and diced
• 6 tbs spicy mayo see main post for options

Equipment

• Calphalon Hard-Anodized Aluminum Nonstick Grill Pan
• Mission Carb Balance Soft Flour Tortillas - 4g net carbs
• Taco Holder Set of 2 - Heavy Duty Stainless Steel 

Step-by-Step Instructions

 

Cook ModePrevent your screen from going dark

1. Pat the tuna steaks dry with paper towels then sprinkle some Mexican seasoning onto both sides.
2. Heat a grill pan over a medium-high heat and cook the tuna until done to your liking. Let rest.
3. Meanwhile, assemble the rest of the taco fillings.  Add the cabbage and radishes to the tortillas.
4. Slice the tuna steaks and divide between the tacos, then add the avocado and finish with a tablespoon of spicy mayo on each taco.
5. Serve immediately.

Nutrition

Serving: 1tacoCalories: 280kcalCarbohydrates: 25gProtein: 18gFat: 19gSaturated Fat: 3.4gCholesterol: 24mgSodium: 443mgFiber: 18.5gSugar: 1gNet Carbs: 6.5g

Notes

6.5g net carbs per taco based on using tortillas with 4g net carbs each

Tried this recipe?

Let us know how it was!

Nutritional information is provided as a courtesy and is my best approximation. Net carbs are calculated as the total grams carbs minus the total grams of fiber.