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Keto Tuna Mayo Filled Avocado

Avocado stuffed with tuna mayonnaise.
Keto Tuna Mayo Filled Avocado

A Little About Keto Tuna Mayo Filled Avocado

Keto Tuna Mayo Filled Avocado is a simple recipe that proved awkward to give a title to. Which way round should it be? Is it Tuna Mayo Filled Avocado, or is it Avocado Filled Tuna Mayo? I’m having continuing doubts even as I write.

Let me pop in a bit of a disclaimer here. This recipe is actually not mine. Shock, horror! I stole it from my mum. She gave me her permission, though, so it’s all good.

Snacks are good!

I wanted to steal the recipe for Keto Tuna Mayo Filled Avocado because it’s nice to have lots of snack variety to choose from when dieting, which works for all diets.  Those times when dinner wasn’t quite enough are the downfall of most diet-fail days, whether it be the digestive torture with the paleo diet, the start over of whole30 or the utter destruction of ketosis for keto and Atkins’.  It’s almost impossible not to ‘scratch the itch’ and go a-hunting in the fridge. And, as everyone knows, the exercise of fridge-hunting is fraught with many perils for dieters.  This is because, more often than not, most pick and eat items aren’t diet compliant. To remain diet compliant, you have to make something, and you don’t want to make something when you just made dinner. You want to eat something, and you want to eat it now! 

So, ok, you still have to make Keto Tuna Mayo Filled Avocado, it’s not quite look-pick-eat, but it’s very close. You can have it put together in less than five minutes. Else, you can make it up, wrap it in clingfilm and keep it in the fridge, ready and waiting. If it isn’t used as a snack, you can use it as a breakfast, lunch, starter or side for sure. I guarantee it won’t go to waste.

Tinned Tuna

Keto Avocado Filled Tuna Mayo

This is canned tuna for some of the countries in the world. 

For tinned tuna, Carl and I use the tuna in olive oil for health reasons. I would heartily recommend it for most people for the same reason as we have but use whichever you wish. Remember, however, to adjust the fat and calories for those on the keto diet as the nutritional values in this recipe are calculated using tuna in olive oil.


Keto Avocado Filled Tuna Mayo

So, considering avocados aren’t the cheapest grocery item, when and how is it best to buy avocados?

I am actually lucky because my little man (the not-so-little owner of a fruit and veg shop I frequent down the road) sells local fruit and veg stuff relatively cheap. I go in, I ask him for avocados to eat today. He disappears. 10 seconds later, he returns with absolutely ripe avocados that I can eat the very same day. And, he charges the same price as the not-so-ripe ones.

For some reason, everywhere in Malta, and I am not sure if this is the rest of the world as well because I can only speak for Malta, shops charge far more for ripe avocados than they do for not-ripe avocados. I have yet to figure out why ripe avocados should cost more than not-yet-ripe ones, and not just a little bit but a lot! Ripe bananas are more expensive than not-ripe ones, so why avocados?  It’s an unsolved mystery, but almost every shop does it. 

Without on hand ripe avocados, you need to preplan your avocado consumption. For those new to the wonders of avocados, let me explain. If you buy the not-yet-ripe avocados and leave them to enjoy the sunshine on a shelf somewhere. Then, a magical day will arrive when the avocado is just ‘perfect’.  Grab the avocado and pop it in the fridge. Safely in the fridge, it will last almost a week in great form.  Just make sure to seize that day!  Else, find yourself your very own little man and ask him for avocados to eat that very same day.

I Recommend This For: Keto Tuna Mayo Filled Avocado

Paleo-ish and Whole30

I find this fits really well as a great starter before Whole30 Salted Sea Bream with Grape Salad and Apple Cider Vinaigrette. And the fats provide a bit more satiety while still providing a fish and salad theme to the whole meal. I think I overthink meal compilation sometimes!


This recipe fits every diet. The mayonnaise I use is a homemade easy-to-make recipe that anyone can whip up in a couple of minutes – no drip, drip, drip necessary.  And, it will fit every diet but paleo.  I leave out paleo because it contains Dijon mustard, and getting paleo-compliant Dijon mustard is not precisely possible in various corners of this world – Malta being one of them. So, if you can, then go ahead with the Easy Homemade Mayonnaise; else, here is a recipe without the Dijon and is wholly paleo compliant.

This recipe is perfectly usable all by itself for breakfast, lunch or as a snack, but if you want to use it as a side dish, I really recommend pairing it with beef, chicken or fish.  The fats in avocados tend to balance out higher protein dishes quite nicely.

Try Paleo Low Carb Blackened Shrimp, Low Carb Simple Juicy and Tender Beef Roast or Pan Fried Chicken Thighs are good.


So the day I have worked out for keto involves the avocado for lunch followed by a whopping great big dinner. As always, feel free to shift things about as you like. Maybe you want the mushrooms for breakfast instead of dinner. Keep in mind that you can’t really spread cream cheese on the Keto Skillet Flatbread. You have to cut the flatbread in half, then place dots of cream cheese around one of the flatbread halves before pressing the other half down to squish the cheese around.

So, the results for this whole day are:

For WomenFor Men
18.8 net carbs22.7 net carbs
95g protein125g protein
115g fat155g fat
1503 kcal2002 kcal

And, this is the menu that made it happen:

For breakfast:

For lunch:

  • Keto Tuna Mayo Filled Avocado

For dinner:

For those extra 500 calories for the men:


This recipe contains a lot more fat than protein, and when it comes to total carbs, the use of avocados makes the total carbs jump to around 12g. So, while this is a filling recipe, it’s up to you whether you think it is worth the 12g of carbs. I placed it in Atkins’ because avocados are pretty filling, and those further down the phases might find it beneficial to have around – snacks are always handy.

However, to even out the fat and total carb content, I would match it with high protein meat. For example, a Low Carb Simple Juicy and Tender Beef Roast will be 12 g total carbs, 75g protein, and 41g of fat, while a Zero Carb Simple Roasted Pork Loin would be 13.9g total carbs, 77g protein and 63g fat.

And Here It Is: Keto Tuna Mayo Filled Avocado

Keto Tuna Mayo Filled Avocado
Keto Tuna Mayo Filled Avocado
Avocado stuffed with tuna mayonnaise.
5 from 1 vote
Prep Time 5 mins
Total Time 5 mins
Course Breakfast, Lunch, Salad, Side Dish, Snacks, Starter
Cuisine Atkins’, Keto, Paleo, Paleo-ish, Whole30
Servings 1 serving
Calories 383 kcal


  • 1 medium avocado
  • 3 tbsp tinned (canned) tuna, drained
  • 2 tsp mayonnaise


  • Cut the avocado in half and remove the stone.
  • In a small bowl mix the tuna and mayonnaise together.
  • Spoon the tuna mayonnaise into the avocado.
  • Serve.


Net Carbs: 2.5g


Serving: 189gSodium: 216mgCalcium: 24mgVitamin C: 12mgVitamin A: 242IUSugar: 0gFiber: 9gPotassium: 780mgCholesterol: 14mgCalories: 383kcalTrans Fat: 0gMonounsaturated Fat: 20gPolyunsaturated Fat: 5gSaturated Fat: 5gFat: 32gProtein: 15gCarbohydrates: 11.8gIron: 1mg
Keyword avocado, low net carb, tuna
Tried this recipe?Let us know how it was!

A Little About Us: Alex, Carl, Isla and Taran

Isla finally lost her first tooth, and the tooth fairy paid 2 euros while the second wobbly tooth is hanging on by a thread.

Since our visit to Playmobil, pirates are the order of the day. Apparently, they made the greatest impression from this weekend. And, after teaching Taran that pirates always say, “Shiver mi timbers!” we now have a regular ”Shiver mi timbers!” during play. 

Comments welcome!

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