Peel the mango and cut it into thin matchstick-sized strips. A julienne peeler can make this process quicker and more uniform. Set the mango aside in a large mixing bowl.
Julienne the zucchini and red bell pepper into thin strips. Slice the spring onions and chili finely. Add everything to the bowl with the mango.
Tear the Cos lettuce into bite-sized pieces. Roughly chop the coriander and mint leaves. These fresh herbs are essential for the salad's signature Thai-inspired flavor.
In a small bowl, whisk together lime juice, sesame oil, garlic, tamari, maple syrup, and black pepper. Mix until the ingredients are fully combined and balanced.
Pour the dressing over the salad ingredients. Toss gently until every piece is lightly coated with the dressing. Taste and adjust seasoning if needed.
Sprinkle the chopped peanuts or cashews over the salad just before serving. This keeps them crunchy and adds a delicious finishing touch.