Go Back
Appetizer made with cucumber slices topped with tuna tartare, sesame seeds, and scallion curls, garnished with radish and cilantro on a white plate.

Fresh Tuna Cucumber Bites

Crisp cucumber slices topped with tender, seasoned tuna, sesame seeds, and scallions — a light, protein-packed appetizer ready in minutes.
Print Recipe Pin Recipe
Prep Time 15 minutes
Course Appetizer, Snack
Cuisine Asian-Inspired
Servings 4
Calories 90 kcal

Ingredients
  

  • 1 large cucumber sliced into thick rounds
  • 1 cup fresh tuna sushi-grade, finely diced
  • 1 tbsp low-sodium soy sauce
  • 1 tsp sesame oil
  • ½ tsp rice vinegar
  • 1 tsp chili flakes optional, for spice
  • 1 tbsp finely chopped red onion or shallots
  • 1 tbsp sesame seeds
  • 1 green onion thinly sliced
  • Fresh radish slices and cilantro for garnish

Instructions
 

  • Prepare the cucumber: Slice into thick rounds (about ½ inch each) and pat dry with paper towels.
  • Make the tuna mix: In a bowl, combine diced tuna, soy sauce, sesame oil, vinegar, chili flakes, and red onion. Mix gently.
  • Assemble: Spoon a small amount of the tuna mixture onto each cucumber slice.
  • Garnish: Sprinkle with sesame seeds, top with green onion curls, and add radish or cilantro for color.
  • Serve immediately: Enjoy chilled for the freshest flavor!

Notes

Tips & Variations

Add avocado or mango chunks for extra creaminess or sweetness.
Swap tuna for salmon, crab, or shrimp for variety.
Drizzle with sriracha mayo or wasabi for a spicy twist.
Chill cucumber slices before assembling for extra crispness.

Storage

Best enjoyed fresh!
You can store the tuna mixture separately (airtight container, fridge) for up to 1 day.
Do not freeze — cucumber will lose texture.
Keyword easy no-cook recipes, fresh tuna tartare bites, gluten-free finger food, healthy tuna appetizers, high-protein snacks, keto tuna recipes, low carb snacks, party appetizers healthy, summer appetizer recipes, tuna cucumber bites recipe