In a medium mixing bowl, combine 1 small, thinly sliced mango, 1 tablespoon roughly chopped cilantro, and teaspoon cayenne pepper. Spoon over halved avocados and sprinkle with 1 tablespoon peanuts and a pinch of salt.
Chop half a medium English cucumber into rough pieces. In a medium mixing bowl, combine chopped cucumber, 3 tablespoons roughly chopped sun-dried tomatoes, and 3 tablespoons roughly chopped kalamata olives. Divide between the avocado halves.