Tuna Avocado Cucumber Boats

Featured in: Pepper-Based Sauces

These refreshing cucumber boats combine crisp vegetables with a protein-rich tuna and avocado filling. The zesty lemon-Dijon dressing adds bright flavor while keeping things light and satisfying. Ready in just 10 minutes with no cooking required—perfect for busy weekdays, quick lunches, or meal prep containers. Each serving delivers 18g of protein with only 10g of carbohydrates, making it ideal for low-carb and gluten-free lifestyles.

Updated on Wed, 11 Feb 2026 10:11:24 GMT
Freshly scooped cucumber boats overflowing with zesty tuna and creamy avocado salad, ready for a quick 10-minute lunch. Save
Freshly scooped cucumber boats overflowing with zesty tuna and creamy avocado salad, ready for a quick 10-minute lunch. | pepperplume.com

These 10-Minute Tuna Avocado Cucumber Boats are a refreshing and nutritious lunch option, perfect for anyone following a low-carb or gluten-free diet. By swapping out bread for crisp cucumber halves, you get a satisfying crunch that beautifully complements the zesty tuna and creamy avocado filling. This dish is designed for quick assembly, making it a staple for busy weekdays and effective meal prep.

Freshly scooped cucumber boats overflowing with zesty tuna and creamy avocado salad, ready for a quick 10-minute lunch. Save
Freshly scooped cucumber boats overflowing with zesty tuna and creamy avocado salad, ready for a quick 10-minute lunch. | pepperplume.com

Not only is this recipe incredibly easy to assemble, but it also offers a vibrant blend of flavors. The acidity of the lemon juice and the slight bite of red onion elevate the tuna salad, while the avocado provides a luxurious, buttery texture that makes every bite feel indulgent yet healthy.

Ingredients

  • 2 large cucumbers
  • 1 ripe avocado, diced
  • 1 (5 oz / 140 g) can tuna in water, drained
  • 2 tablespoons red onion, finely chopped
  • 1 tablespoon fresh parsley or cilantro, chopped
  • 1 tablespoon lemon juice
  • 1 teaspoon olive oil
  • ½ teaspoon Dijon mustard
  • Salt and freshly ground black pepper, to taste
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Instructions

Step 1
Slice the cucumbers in half lengthwise. Use a spoon to gently scrape out the seeds, creating boats.
Step 2
In a bowl, combine the diced avocado, drained tuna, red onion, and parsley or cilantro.
Step 3
In a small bowl, whisk together the lemon juice, olive oil, Dijon mustard, salt, and pepper.
Step 4
Pour the dressing over the tuna-avocado mixture and mix gently until well combined.
Step 5
Spoon the filling evenly into the cucumber boats.
Step 6
Serve immediately, garnished with extra herbs if desired.

Zusatztipps für die Zubereitung

To make the perfect boats, use a sharp knife for the initial lengthwise cut and a standard spoon to hollow out the watery seeds. For the best flavor experience, ensure your tuna is thoroughly drained before mixing. Each serving contains approximately 220 calories, providing a balanced ratio of 12g fat, 10g carbs, and 18g protein.

Varianten und Anpassungen

This recipe is highly versatile; you can swap the canned tuna for cooked shredded chicken or even chickpeas for a vegetarian version. If you want more texture, consider adding finely diced tomatoes or bell peppers to the filling mixture for an extra crunch.

Serviervorschläge

For the most refreshing taste, serve these cucumber boats immediately while chilled. If you enjoy a bit of heat, try mixing a few drops of your favorite hot sauce into the dressing before drizzling it over the tuna and avocado. Garnish with a sprig of fresh herbs to add a pop of color.

Bright, low-carb Tuna Avocado Cucumber Boats garnished with herbs, served on a rustic wooden board. Save
Bright, low-carb Tuna Avocado Cucumber Boats garnished with herbs, served on a rustic wooden board. | pepperplume.com

Enjoy this simple yet elegant meal that brings together the best of fresh produce and pantry staples. These Tuna Avocado Cucumber Boats are proof that eating well can be both fast and delicious.

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Recipe FAQ

How long do cucumber boats stay fresh?

These are best enjoyed immediately for optimal crunch. However, you can prep the tuna-avocado mixture up to 24 hours in advance and assemble the boats just before serving to prevent the cucumbers from becoming soggy.

Can I make these ahead for meal prep?

Yes! Store the filling and cucumber halves separately in airtight containers. The filling keeps well for 2-3 days refrigerated. Assemble when ready to eat—add a squeeze of fresh lemon to revive the flavors.

What protein alternatives work well?

Shredded rotisserie chicken, cooked chickpeas, or flaked salmon make excellent substitutions. Each maintains the creamy texture while offering different flavor profiles. Adjust cooking time accordingly if using raw proteins.

How do I prevent the avocado from browning?

The lemon juice in the dressing naturally helps prevent oxidation. Tossing the diced avocado with a teaspoon of lemon juice before combining with other ingredients adds extra protection. Keep the mixture tightly covered and refrigerated.

What vegetables add extra crunch?

Diced bell peppers, radishes, celery, or jicama provide satisfying texture. Finely shredded cabbage or carrots work well too. Add these raw vegetables to the filling mixture for maximum crispness and fresh flavor.

Are these suitable for keto diets?

Absolutely! With only 10g of carbohydrates per serving and healthy fats from avocado, these boats align perfectly with ketogenic eating. The high protein content (18g) helps keep you satisfied while supporting low-carb goals.

Tuna Avocado Cucumber Boats

Crisp cucumber boats loaded with zesty tuna and avocado salad. Fresh, satisfying low-carb lunch ready in 10 minutes.

Prep duration
10 min
0
Complete duration
10 min
Created by Isabella Flores


Complexity Easy

Heritage International

Output 2 Portions

Diet considerations No dairy, No gluten, Low-Carbohydrate

Components

Main

01 2 large cucumbers
02 1 ripe avocado, diced
03 1 can (5 oz) tuna in water, drained

Vegetables & Herbs

01 2 tablespoons red onion, finely chopped
02 1 tablespoon fresh parsley or cilantro, chopped

Dressing

01 1 tablespoon lemon juice
02 1 teaspoon olive oil
03 ½ teaspoon Dijon mustard
04 Salt and freshly ground black pepper to taste

Directions

Phase 01

Prepare cucumber boats: Slice cucumbers in half lengthwise. Using a spoon, gently scrape out the seeds to create hollow boats for filling.

Phase 02

Combine filling ingredients: In a mixing bowl, combine diced avocado, drained tuna, chopped red onion, and fresh parsley or cilantro.

Phase 03

Prepare dressing: In a small bowl, whisk together lemon juice, olive oil, Dijon mustard, salt, and freshly ground black pepper until emulsified.

Phase 04

Dress the mixture: Pour dressing over the tuna-avocado mixture and gently fold until evenly combined, being careful not to break down the avocado.

Phase 05

Fill cucumber boats: Spoon the filling evenly into the prepared cucumber boats, distributing the mixture equally among all pieces.

Phase 06

Serve: Arrange on a serving plate and serve immediately, garnishing with additional fresh herbs if desired.

Necessary tools

  • Sharp knife
  • Spoon
  • Mixing bowl
  • Small whisk or fork

Allergy details

Review each ingredient for potential allergens and seek professional health advice if you're uncertain.
  • Contains fish (tuna)
  • Contains mustard
  • Verify tuna and mustard product labels for potential cross-contamination risks

Nutrient breakdown (per portion)

These values are estimates only and shouldn't replace professional medical guidance.
  • Energy: 220
  • Fats: 12 g
  • Carbohydrates: 10 g
  • Proteins: 18 g