These seared ahi tuna cucumber bites with wasabi mayo are the simplest, most impressive appetizer you can make. Ready in minutes, they combine tender, sesame-crusted ahi with crisp cucumber rounds and a creamy, bright wasabi mayonnaise. Perfect for entertaining or a quick snack, this recipe is flavorful, elegant, and easy to scale.
Ingredients you need for this ahi tuna appetizer
- sushi-grade ahi tuna steaks (about 1 pound)
- white and black sesame seeds (about 1/3 cup each)
- sesame oil (2 tablespoons)
- English or Persian cucumbers (2)
- mayonnaise (about 1/3 cup)
- wasabi (paste, powder, or fresh — 1–2 tablespoons, to taste)
- rice wine vinegar (1/2 tablespoon)
- salt and sugar (to taste)
- chives or green onions and edible flowers for garnish (optional)
Steps to make this recipe
Step 1: Prep the cucumbers
Slice cucumbers into rounds. Cut them to your preferred thickness — slightly thicker slices hold the tuna better. Set aside.
Recipe Tip
For extra flavor and a firmer bite, sprinkle cucumber slices lightly with salt, let sit for 10–15 minutes to draw out moisture, then rinse and pat dry before assembling.
Step 2: Make the wasabi mayo
In a small bowl, whisk together mayonnaise, wasabi (start with 1 tablespoon and add more if you like it spicier), rice wine vinegar, a pinch of salt, and a little sugar to balance. Taste and adjust seasoning. Set aside.
Step 3: Season and sear the tuna
Brush the tuna with sesame oil, then press it into a mixture of white and black sesame seeds so the exterior is evenly coated. Heat a skillet or grill until very hot. Sear the tuna 20–30 seconds per side for a nicely browned exterior while keeping the center medium-rare. Adjust time slightly for thicker or thinner steaks. Remove from heat, let rest briefly, then slice thinly.
Step 4: Assemble the bites
Top each cucumber round with a slice of seared ahi tuna, add a small dollop of wasabi mayo, and finish with chopped chives or green onions and edible flowers if using. Serve immediately.
Tips, tricks and substitutions
Wasabi options: Use fresh wasabi if available, or wasabi paste or rehydrated powder. Start conservatively — wasabi can be quite potent.
Other fish options: If you prefer, substitute seared salmon, yellowtail, or albacore. Raw scallops are another elegant alternative if you enjoy sashimi-style seafood.
More uses for wasabi mayo: This sauce works well as a dip for roasted asparagus, a spread for crostini or sandwiches, or a dressing for tomato or green salads. It adds a bright, creamy heat to many dishes.
More appetizers to check out
- Roasted Garlic & Herb Yogurt Dip
- Spiced Lamb Pita Chips with Whipped Feta
- Mushroom & Sage Toasts with Whipped Goat Cheese
- Lemon Haricots Verts (French Green Beans) with Crispy Shallots
If you try this ahi tuna appetizer, leave a comment or rating to share how it turned out — feedback helps refine the recipe. Tag photos on social media if you’d like to show your version. Enjoy!
Seared Ahi Tuna Cucumber Bites with Wasabi Mayo
Ingredients
For the ahi tuna
- 1 pound sushi-grade ahi tuna
- 1/3 cup white sesame seeds
- 1/3 cup black sesame seeds
- 2 tablespoons sesame oil
- 2 English cucumbers (or Persian)
- Chives, thinly sliced, and edible flowers (optional)
For the wasabi mayo
- 1/3 cup mayonnaise
- 1–2 tablespoons wasabi paste (or powder/fresh, to taste)
- 1/2 tablespoon rice wine vinegar
- Salt and sugar, to taste
Instructions
- Prep cucumbers: Slice into rounds to your preferred thickness and set aside. Optionally salt, rest, rinse, and dry for a firmer bite.
- Make wasabi mayo: Whisk mayo, wasabi, rice wine vinegar, salt, and a pinch of sugar until smooth. Adjust seasoning to taste and set aside.
- Coat tuna: Brush tuna with sesame oil and press into a mix of white and black sesame seeds until coated.
- Sear: Heat a skillet or grill until very hot. Sear tuna 20–30 seconds per side for a browned exterior and medium-rare center. Rest briefly, then slice thinly.
- Assemble: Top each cucumber round with a slice of tuna, a dollop of wasabi mayo, and garnish with chives or edible flowers. Serve immediately.
Nutrition
Calories: 93 kcal; Carbohydrates: 7 g; Protein: 1 g; Fat: 7 g. Nutrition information is an approximation.