Place spring mix in a large bowl. Add black beans, tomatoes, corn, red onion, avocado, green onion, cilantro, cotija cheese and tortilla strips in a large bowl. Combine.
To make dressing, add all dressing ingredients to a blender. Blend until smooth.
Drizzle dressing over salad. Serve immediately.
The calories shown are based on the salad serving 4 and all of the dressing being used (divided 4 ways). Since different brands of ingredients have different nutritional information, the calories shown are just an estimate.