Finely grate peel from 1 line and place in bowl along with lime juice. Whisk in soy sauce, sugar and jalapeno until sugar/honey is dissolved. Gradually whisk in oil until blended. Add salt to taste. Set aside.
Toast peanuts by placing chopped nuts on baking sheet in a single layer in 350 oven. Toast 7 – 10 minutes, stirring occasionally until fragrant.
Peel mango, then cut away chunks of fruit from pit. Cut into thin strips and place in bowl. Seed peppers and cut into thin strips and add to mango. Coarsely grate carrot and thinly sliced green onions and add to bowl with coriander. Toss gently to combine.
Add dressing and toss until mixed. Sprinkle with peanuts.