Bring the restaurant home with this vibrant Watermelon and Tuna Sashimi. This light, refreshing dish balances the clean flavor of sushi-grade ahi tuna with sweet watermelon, bright microgreens, and a tangy ponzu-sesame dressing. It’s an elegant appetizer or light main that comes together in minutes and delivers big flavor without fuss.
I developed this recipe after a trip to Kauai and quickly became obsessed. The combination of fresh fish, juicy watermelon, and a little heat from chile is addictive. Beyond the flavors, the recipe is perfect for quick entertaining—whisk a few ingredients for the sauce, slice the tuna and watermelon, arrange on a platter, and finish with microgreens and crumbled goat cheese.
Finish the plate with a light drizzle of extra virgin olive oil and a sprinkle of flaky salt for a savory contrast. The creamy, slightly tangy goat cheese pairs surprisingly well with the fish and fruit, while microgreens lend freshness and visual appeal. A final drizzle of the ponzu mixture ties everything together for a bright, balanced bite.
Ingredients
- 1 garlic clove, minced
- 1 Hawaiian or Thai chile, very thinly sliced (adjust heat to taste)
- 1 tablespoon toasted sesame oil
- 1/4 cup ponzu
- 1/2 pound sashimi- or sushi-grade ahi tuna
- 3/4 cup watermelon, cut into thin domino-size slices
- 1 tablespoon extra virgin olive oil
- 1/4 teaspoon flaky salt
- 1/4 cup microgreens (Daikon radish microgreens recommended)
- 1 tablespoon crumbled goat cheese
Step-by-Step Instructions
Step One: Make the sauce
In a small bowl, whisk together the minced garlic, thinly sliced chile, toasted sesame oil, and ponzu. Let the mixture rest for a few minutes so the flavors meld and the chile and garlic infuse the sauce.
Step Two: Slice the tuna
Use a very sharp knife to slice the tuna against the grain into thin, domino-size pieces. Clean, even slices make the dish look polished and ensure a pleasant texture in each bite.
Step Three: Plate the tuna and watermelon
Arrange the tuna and watermelon on a platter, alternating slices so the fish and fruit layer together. This creates an attractive presentation and lets guests enjoy both flavors in each bite. Drizzle the layered pieces lightly with extra virgin olive oil and sprinkle with flaky salt.
Step Four: Add the sauce
Gently pour or drizzle the ponzu-sesame mixture over the arranged sashimi, reserving about 1 tablespoon of the dressing for finishing.
Step Five: Finish and serve
Scatter microgreens and crumbled goat cheese across the top, then finish with the remaining tablespoon of the ponzu mixture. Serve immediately so the tuna stays tender and the watermelon remains crisp.
Recipe Tips and Variations
- If you can’t find Hawaiian chile, Thai chile is an excellent substitute—use less if you prefer milder heat.
- Sushi-grade tuna is often available frozen at reputable fish markets and grocery stores; thaw it in the refrigerator before slicing.
- For a dairy-free version, omit the goat cheese and increase microgreens or add thinly sliced avocado for creaminess.
- To serve a larger crowd, scale the ingredients proportionally and stagger plating so pieces stay chilled and fresh.
Frequently Asked Questions
Look for a trusted fish market or a grocery store with a good seafood counter; many sell sushi-grade tuna, sometimes previously frozen. Thaw it in the refrigerator before preparing.
Daikon radish microgreens offer a pleasant peppery note, but any microgreens you like will work—arugula microgreens or mixed baby greens are good alternatives.
Thai chile is a great substitute. Adjust the quantity to match your heat tolerance.
The creamy, tangy goat cheese contrasts nicely with the fish and watermelon. If you prefer to skip dairy, the dish is still excellent without it.
Nutrition (approximate per serving)
Calories: 336 kcal; Carbohydrates: 7 g; Protein: 28 g; Fat: 21 g; Sodium: 1032 mg. Nutrition information is automatically calculated and should be used as an estimate.
Additional Info
Servings: 2. Author: Alex Snodgrass. Photographer and food styling credited to Eat Love Eats.
I hope this Watermelon and Tuna Sashimi brings a bright, vacation-like vibe to your next meal. If you try it, leave a comment to share your adjustments or serving ideas!