In a large bowl, combine the black beans, pre-cooked quinoa, chopped red onion, cilantro, tomatoes, corn kernels, diced avocado, bell peppers and jalapeño (if using).
In a small bowl, whisk together the olive oil, lime juice, vinegar, garlic granules, ground cumin, chili powder, smoked paprika, cayenne, salt, and pepper to make the dressing.
Pour the dressing over the salad ingredients and toss until everything is well coated.
Taste and adjust the seasoning if needed, adding more salt, pepper, or lime juice as desired.
Serve the salad immediately, garnished with additional cilantro if desired, and with tortilla chips on the side if desired.