In a frying pan, put the balsamic vinegar and honey, over low heat, let it reduce for a couple of minute, take of the heat and reserve.
Season your shrimp with the crushed garlic, salt and pepper, in a frying pan, heat the olive oil, and when is hot, add your shrimp and let it cook until they change colors, then they are done, take them off the heat and reserve.
In a small bowl mix all the ingredients from the vinaigrette, and reserve.
In a serving plate, put your lettuce, top with the mangoes and avocados arrange like a fan, then top of with the shrimp. Refrigerate until service.
At the table let each person season with the vinaigrette as much or as little they wish.