Finely chop the mint, cilantro, serrano chilli and onion together. I used a manual chopper, but use whatever you have. In a mixing bowl, add the rinsed black beans, tomato and the herb onion mixture. Sprinkle salt, lemon zest and toss together.
Add the chopped carrots, green peppers, lemon+lime juice and mix well. I like to serve these in lettuce cups with my favorite rye baguette, makes for a great lunch. It can also be served as a side with entrees.