Making salad: Peel and dice the avocados and mix with the lime juice. Combine with, onions and peppers.
2. Making dressing
Mix the vinegar. oil and salt.
3. Serving
Drizle the vinagraitte over the avocado salad, and sprinkle with pepper to taste, and more salt if you find it necessary. Decorate with cilantro leaves. Serve inmediately (see notes).
Notes
To make ahead, mince onions and pepper, make the vinaigrette, but only cut and dice the avocados shortly before serving as they'll oxidize and darken soon after.