In a small bowl, whisk together the olive oil, lime juice, balsamic vinegar, chili powder, cumin, salt, and sugar.

Rinse and drain both cans of beans in a colander. Once well drained, transfer them to a large bowl.

Finely dice the bell pepper, tomatoes, jalapeño, and red onion. For a less spicy salad, scrape the seeds out of the jalapeño before dicing. Roughly chop the cilantro.

Add the chopped vegetables to the bowl with the beans.

Pour the dressing over the salad, then stir until everything is well coated. Serve immediately, or refrigerate until ready to eat.