Seasoning shrimp: Mix vinegar, oil, sugar, and chili powder. Mix well.Add the shrimps and marinate for an hour in the fridge.
Grilling shrimp: Heat a stovetop grill or BBQ over high heat and grill shrimp until they turn pink on one side, turn and repeat. If you wish you can cut the shrimps into small pieces, or serve them whole.
Mixing dressing: Mix sugar, vinegar, oil and salt to taste. Set aside.
Serving: Mix mango, lettuce and tomatoes. Arrange the shrimp on top.Accompany the salad with dressing.
Video
Notes
If you like your mangos crunchier, pick the ones that aren't ripe yet. If you use ripe mangos don't use the sugar, the mangos are sweet enough.