Cucumber Tuna Sandwiches Low Carb Recipe
Cucumber Tuna Sandwiches

Keto Cucumber Tuna Sandwiches

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Cucumbers are just amazing! They are crunchy, juicy, and very refreshing. This vegetable can adsorb flavors and really add a lot of variety to a dish. There are so many ways you can use this vegetable to enhance a recipe, but why not make it the front runner?

In this recipe, not only is the cucumber the bread for the sandwich, but we also added cucumbers to the tuna salad to make it super refreshing and crunchy.

We used homemade mayonnaise for this recipe, but you can also use ricotta cheese or feta. We recommend smashing the feta with a fork and adding a little of olive oil to make it more of a spread and allow all ingredients to be combined like a tuna salad should be.

Tuna is an excellent source of protein. It’s also low in fat and overall calories. However, this recipe calls for canned tuna. 

Look for a brand that contains wild-caught tuna with low levels of mercury. Also, be sure your tuna does not contain added sugars, artificial flavors, food dyes, preservatives, or lots of sodium. 

Celery is made mostly of water. It helps keep you hydrated to flush toxins out of the body and contains antioxidant properties with healing effects that fight free radical damage and reduce inflammation. It has been linked to a reduced risk of cardiovascular disease (1).

You can also make this recipe with shredded chicken breast or smoked salmon and use celery in place of the onions for the crunch effect. If you decide to try this with salmon, it would be delicious to add some dill to it. We can guarantee it will be a success.

This is a great recipe for lunch or you can enjoy it as an appetizer. No matter when you serve it, you will hear people eating this delicious sandwich from a mile away!

Let’s Do It!

Start by cutting the cucumber and slicing a portion of it into thin strips, then dice the rest.

Slice and dice cucumber

After that, put the diced cucumbers in a bowl, then add the mayo, tuna, sesame seeds, and diced onion. Mix together with some salt and pepper.

Mix tuna with mayo and cucumber

Make a sandwich by adding the mixture between two slices of cucumbers. Serve and enjoy.

Cucumber Tuna Low Carb Sandwich Recipe

Note: This is supposed to be a quick and light lunch. If you want to increase protein, add more tuna. If you want to reduce carbs, use less onion or simply don’t use it at all. You can also use lettuce instead of cucumber for fewer carbs like these Chicken Lettuce Wraps.

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Low Carb Cucumber Tuna Sandwich


Cucumber Tuna Sandwiches
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5 from 3 votes

Cucumber Tuna Sandwiches

These cucumber tuna sandwiches are quick and easy to make. You'll love it!
Course Lunch
Cuisine Ketogenic, Low Carb
Keyword cucumber tuna sandwiches, keto tuna sandwiches, low carb, sandwiches
Prep Time 10 minutes
Total Time 10 minutes
Servings 2
Calories 251kcal
Author Tanya K.


  • 1/2 cucumber sliced lengthwise 1-2thick
  • 1/2 cup diced cucumber
  • 1/4 cup diced onion
  • 1/2 cup canned tuna drained solids
  • 1 tsp roasted sesame seeds
  • 1/4 cup Mayonnaise
  • 1/2 tsp salt
  • 1/4 tsp black pepper


  • Cut the cucumber. Slice a portion of it into thin strips and dice the rest.
  • Put the diced cucumbers in a bowl. Add the mayo, tuna, sesame seeds, and diced onion. Mix together with some salt and pepper.
  • Sandwich the mixture between two slices of cucumbers. Serve and enjoy.



Nutrition Facts
Cucumber Tuna Sandwiches
Amount Per Serving
Calories 251 Calories from Fat 198
% Daily Value*
Fat 22g34%
Saturated Fat 3g15%
Cholesterol 26mg9%
Sodium 857mg36%
Potassium 245mg7%
Carbohydrates 5g2%
Fiber 1g4%
Sugar 3g3%
Protein 9g18%
Vitamin A 55IU1%
Vitamin C 5mg6%
Calcium 27mg3%
Iron 0.9mg5%
* Percent Daily Values are based on a 2000 calorie diet.
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