Grilled Spicy Tuna

When you don’t want the carbs from sushi, Grilled Spicy Tuna is a delicious idea for dinner. Use Grilling Recipes for more ideas like this one.

Click here to PIN Low-Carb Grilled Spicy Tuna!

Grilled Spicy Tuna top photo

I still had a few recipes hanging around in my recipe archives that didn’t have a photo, from the days before I entered the digital camera age. Now that I have my new camera there’s an entire new set of photos from the time before I entered the improved-photos-SLR-Digital-Camera age, but I guess those will have to wait until I get all the photo-less recipes taken care of!

This recipe for Grilled Spicy Tuna was something I created in memory of Spicy Tuna Rolls, which have long been one of my favorite sushi dishes. Now that I’m following a more carb-conscious diet, sushi is something I’ll eat once in a while, and it’s still my very favorite food. But sushi is definitely a diet splurge for me, and if you’re trying to lose weight, this grilled tuna is a better choice. I used frozen Ahi tuna steaks from Costco, a great source for frozen fish if you aren’t lucky enough to live where fresh fish is easy to obtain. If you can’t find tuna, I think this would taste great on mahi mahi, swordfish, or halibut.

I ate this last night, after working all day around home on various blogging projects, and it tasted great with a salad with Cardini’s Caesar Dressing, (affiliate link) one of my favorite salad dressings. If you’re in the northern hemisphere, grilling season won’t last too much longer, so give this a try if you like tuna.

Make it a Low-Carb Meal:

For a tasty low-carb meal, serve with Mary’s Perfect Salad, Grilled Zucchini Greek Salad, or Low-Carb Greek Cabbage Salad.

More Tasty Recipes for Fish on the Grill:

Soy-Grilled Mahi Mahi with Korean Dipping Sauce
Grilled Salmon with Maple-Sriracha-Lime Glaze
Grilled Halibut with Cumin and Lime

Grilled Spicy Tuna

When you don’t want the carbs from sushi, Grilled Spicy Tuna is a delicious idea for dinner.



  • thick cut pieces of tuna, one per person

Marinade Ingredients

  • 1/4 cup olive oil
  • 2 T red wine vinegar
  • 1 T soy sauce (use gluten-free soy sauce if needed)
  • 1 tsp. garlic powder
  • 1 tsp. fish rub or seafood seasoning
  • 1 tsp. hot pepper flakes (like the kind you sprinkle on pizza, or use your favorite hot sauce)


  1. Combine marinade ingredients.
  2. Put tuna in zip loc bag and pour marinade over.
  3. Marinate in refrigerator 1-3 hours. (As a general rule, don’t marinate fish too long or the acidy ingredient in the marinade starts to “cook” the fish.)
  4. To cook, oil your grill with a piece of paper towel dipped in olive oil, then preheat charcoal or gas grill to high. (You can only hold your hand there about 2 seconds when the grill is high.)
  5. Put fish into a colander placed in the sink and drain marinade off, discarding the marinade.
  6. Grill fish 4-6 minutes on each side. (Use this as a guide: 4 minutes per side for medium rare, 5 minutes per side for medium, six minutes per side for well done.) If you want those lovely grill marks, be sure grill is very hot, lay tuna diagonally on the grill, wait three minutes, rotate, wait three minutes and cook less time on the other side.<


I used Szeged Fish Rub (affiliate link). Trader Joe’s also makes a good seafood seasoning. For those who don’t have seafood seasoning, the Pride of Szeged Fish Rub contains paprika, pepper, salt, lemon juice, and spices.

Recipe created by Kalyn.

All images and text ©

Low-Carb Diet / Low-Glycemic Diet / South Beach Diet Suggestions:
Grilled Spicy Tuna is a great dish for low-carb and low-glycemic diet plans, and for any phase of the South Beach Diet.

Find More Recipes Like This One:
Use the Recipes by Diet Type photo index pages to find more recipes suitable for a specific eating plan. You might also like to Follow Kalyn’s Kitchen on Pinterest to see all the good recipes I’m sharing there.

Nutritional Information?
If you want nutritional information for a recipe, I recommend entering the recipe into this nutrition analyzer, which will calculate it for you. Or if you’re a member of Yummly, you can use the Yum button on my site to save the recipe and see the nutritional information there.

Pinterest image of Grilled Spicy Tuna