Gather all the ingredients for the avocado salad. Chop 2 ripe avocados into bite-sized pieces. Dice your chosen bell pepper and a small red onion into uniform pieces. Finely chop cilantro if using.

In a medium mixing bowl, combine the chopped avocados, diced bell pepper, and onion. Pour in the juice of one lime. Sprinkle in 1/8 teaspoon of salt and a dash of black pepper.

If desired, mix in 1/2 cup of black beans or diced cucumber. Gently fold with a rubber spatula.

Taste the salad and adjust seasoning with more salt, pepper, or lime juice as desired.

Let the salad sit for about 10 minutes at room temperature before serving.