Prep the produce: Slice or cube the mango. Cut the cucumber and onion thin so they stay crisp.
Chop the herbs and chili.
Mix the dressing: In a small bowl, whisk lime juice, vinegar, fish sauce (or soy), honey, sesame oil, salt, and pepper until smooth.
Combine the salad: In a large bowl, add mango, cucumber, onion, chili, and herbs. Gently toss with half the dressing.
Add richness: Fold in avocado if using. Sprinkle with nuts for crunch.
Taste and adjust: Add more dressing, lime, or salt as needed.
You want bright, sweet-tangy balance.
Serve right away: It’s best fresh, while the cucumbers are still snappy.