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Tuna & Avocado Cucumber Sushi Bites Recipe
Ash Tyrrell

Tuna & Avocado Cucumber Sushi Bites Recipe

I still remember the first time I made this Spicy Tuna & Avocado Cucumber Sushi Bites Recipe bites at home. It felt like bringing a sushi restaurant experience straight into my kitchen. I loved how fresh, light, and flavorful every single bite turned out.
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Total Time 15 minutes
Servings: 3
Ingredients Method Notes

Ingredients
  

  • 1 large cucumber — Choose a firm seedless cucumber so the slices hold their shape better; English cucumbers work best for clean, crunchy cups.
  • 1 cup sushi-grade tuna finely diced — Always use fresh sushi-grade tuna for safety and best flavor; avoid frozen or low-quality fish.
  • 2 tablespoons mayonnaise — Adds creaminess and helps bind the spicy tuna mixture smoothly.
  • 1 –2 teaspoons sriracha sauce — Adjust based on spice preference; start small and increase gradually.
  • 1 teaspoon soy sauce — Enhances umami flavor and balances the spice.
  • 1 teaspoon sesame oil — Adds a nutty aroma and deeper flavor to the tuna mixture.
  • 1 ripe avocado diced or mashed — Use ripe but slightly firm avocado for creamy texture without becoming mushy.
  • 1 teaspoon rice vinegar — Lightly seasons avocado and keeps it fresh-tasting.
  • 1 teaspoon sesame seeds — Adds crunch and a subtle roasted flavor on top.
  • Optional garnish: sliced green onions or chili flakes — Adds color and an extra flavor kick.

Method
 

  1. Start by washing and drying the cucumber thoroughly. Slice it into thick, even rounds so they can hold the filling. Lightly scoop out the center to create small edible cups.
  2. Finely dice sushi-grade tuna into small pieces. Mix it with mayonnaise, sriracha, soy sauce, and sesame oil. Stir gently until everything is evenly coated and creamy.
  3. Cut the avocado and lightly mash or dice it based on texture preference. Add a splash of rice vinegar for freshness and flavor balance. Keep it slightly chunky for better bite and texture contrast.
  4. Place a small amount of avocado into each cucumber cup first. Top it with a spoonful of spicy tuna mixture carefully. Make sure each bite is evenly filled and visually appealing.
  5. Sprinkle sesame seeds over the top for crunch and flavor. Add green onions or chili flakes if you like extra spice. Serve immediately while everything is fresh and crisp.

Notes

  • I always chill the cucumber before assembling
  • I avoid over-mixing tuna
  • I taste spice before assembling
  • I use very sharp knife for clean cuts
  • I serve immediately after assembling