Add the black beans, bell pepper, green onion, corn, and cheese. Stir to combine.
Add the pasta and stir it up.
The easiest way to make the dressing is to combine all the ingredients in a jar with a tight fitting lid. Give it a good shake until the oil has mixed in. If you need to mix this in a bowl, whisk together all ingredients apart from the oil, the drizzle the oil in slowly while whisking all the while until everything is well combined.
Pour the about 2/3 of the dressing over your salad and give it a stir. If you want more, add it. If not, save it for when you're ready to serve. You might find that after the pasta salad has cooled in the fridge, it can take a little more. Drizzle it over and stir well before serving.
Allow the salad to chill in the fridge for at least an hour, but overnight is even better.