Cook the pasta according to package instructions until al dente (8-10 minutes), then drain and rinse under cold water.

Chop the tomatoes, slice the green onions, and shred the lettuce. Rinse and drain the black beans.

In a large mixing bowl, combine the cooled pasta with corn, black beans, tomatoes, green onions, and lettuce.

Whisk together the Catalina dressing and taco seasoning in a separate bowl until well mixed.

Pour the dressing over the salad ingredients, toss to coat, and serve immediately, adding crushed Doritos just before serving.