This pepper tuna steak recipe is simple but elegant. Meaty and tender these tuna steaks taste even better with the simple lemon dijon cream sauce for only 2.9g net carbs. Best of all you can make this easy low carb fish dinner in just 15 minutes! [Updated]
You might also like this keto cod with creamy sun dried tomato sauce.
We don’t eat fish very often in our house. Mostly because I don’t know many ways to prepare it. However I remember I used to make this tuna with black pepper recipe years ago and was craving it.
In restaurants I love to order seared tuna steak topped with a tasty cream sauce so today I made my own! This easy pepper tuna steak recipe has a simple but tasty lemon dijon cream sauce with it and it’s so delicious!
Because fresh tuna is very “meaty” you will feel like you are eating a keto steak dinner and it only has 2.9g net carbs. So it’s a nice seafood dish to serve a meat lover!
More keto fish & seafood recipes!
While this is the only fresh tuna recipe I have on the site, I now have over 45 keto seafood recipes. One of my most popular is an asiago tilapia recipe. I would eat this every week because it’s easy and very tasty.
What fresh tuna steaks tastes like
If you’ve never had fresh tuna you might be surprised that it is nothing like canned tuna. The raw fish is a deep red color with a mild flavor. When you cook tuna, it turns from pink to tan. It’s a very meaty fish with a dense and firm texture much like beef. To learn more about fresh tuna click here.
The easy way to cook tuna steaks
If you wondered how to cook tuna steak, let me tell you it is very easy in a cast iron skillet. I find that fresh cracked ground pepper is the best seasoning for steaks in my opinion. You can skip that step if you don’t like pepper or even use steak seasoning.
Here is how to sear tuna steaks:
- Get your skillet real hot. Use a cast iron skillet if you have it.
- Sprinkle a little salt and rub cracked pepper on both sides of the raw fish.
- Pour a little olive oil into the hot skillet.
- Seared each side for about 3-5 minutes without disturbing them. The meat will cook it’s way up the steak from the bottom. So once it has cooked 1/4 of the way up flip it to the other side. Then take it out of the pan when that side has cooked 1/4 of the way up but keep a very rare center.
- Let it sit for a few minutes and it will cook a bit more.
- See the pictures below for what they should look like in each step.
Lemon Dijon sauce for tuna steaks
While the tuna is searing, make the simple lemon dijon sauce. The ingredients are butter, heavy cream, broth, garlic, dijon mustard, fresh lemon juice and lemon zest.
Add the butter to a small sauce pan and let it melt. Then add in the rest of the ingredients and whisk to combine. Note you can use chicken, beef or vegetable broth.
You can make it thicker by letting it simmer and condense or just serve it right away. It only takes a few minutes to make.
You can also make it thinner by adding a bit more cream or broth. When the tuna is done and has sat for a few minutes, you can serve them with the sauce on the side or drizzled over the seared tuna.
Low carb side dishes
to go with this meal
You can also keep it simple with a buttered, steamed vegetable and a big green salad.
Recipe Notes and Tips
- I bought this fish at Costco and of course got these huge pieces. It was a lot for the 3 of us so next time I will half this recipe.
- These steaks are dense and filling so you don’t need a big piece.
- The lemon dijon sauce is optional but I really think it adds to the dish. You could also a bit of grated parmesan cheese to the sauce to make it thicker and richer. You can also try an herb butter on top.
- If you are not a black pepper fan, you can try some steak seasoning too and it will really taste like a steak!
I hope you enjoy this easy tuna recipe and especially sauce. It will definitely be making an appearance in our keto meal plan.
The nutritional information for 1 serving is 335 calories:
11.7g fat / 3g carbs / 0.1g fiber / 36.9g protein = 2.9g net carbs
- 2 lbs tuna steaks (6 tuna steaks)
- 2 tablespoons coarsely ground black pepper
- 1/2 teaspoon salt
- 1 tablespoon olive oil
- 1 tablespoon butter
- 1/2 cup heavy cream
- 1 tablespoon dijon msutard
- 1/2 cup broth (chicken, beef or vegetable)
- 2 cloves garlic, crushed
- 1/2 lemon juiced
- 1/2 lemon zest
- Preheat a cast iron skillet over medium high heat.
- While it's heating, rub the crushed pepper on both sides of the tuna steaks.
- Also sprinkle a bit of salt on both sides.
- Once the skillet is heated add the oil and then sear the steaks on both sides.
- Seared each side for about 3-5 minutes without disturbing them. The meat will cook it's way up the steak from the bottom. So once it has cooked 1/4 of the way up flip it to the other side.
- Then take it out of the pan when that side has cooked 1/4 of the way up but keep a very rare center.
- While the steaks are cooking, heat up another skillet.
- Add the butter, cream, mustard, garlic, lemon juice and zest and broth.
- Whisk and bring to a simmer.
- Serve along side or over top steaks.
The nutritional information for 1 serving is:
335 cals / 11.7g fat / 3g carbs / .1g fiber / 36.9g protein = 2.9g net carbs
Nutrition Information:Yield: 6 Serving Size: 1
Amount Per Serving: Calories: 335Net Carbohydrates: 2.9gg