This was such a great light salad, that we loved with some grilled chicken. It could easily be used as a dip or appetizer.
Black Bean Salad
1/2 small-medium red onion, finely diced
Combine all ingredients except for avocados in a large bowl and mix well. Cover and chill for a few hours or overnight. Right before serving, add avocados and mix gently, being careful not to mash avocados. Garnish with a more chopped cilantro if desired.