Cook the rotini according to package directions. Drain and rinse under cold, running water until cool. Drain well and set aside.

Mash the avocado with a fork until smooth. Blend the avocado with the sour cream, jalapeno, lime juice, chili powder, cumin, salt, pepper and garlic until well combined. Taste and adjust seasonings as needed.

Toss the rotini with the beans, corn, tomato, red pepper and avocado mixture until coated evenly. Sprinkle with green onions and cheese before serving.

If making ahead, prepare the salad mixture and all of the dressing except for the avocado. For the brightest colour, add the avocado to the dressing at the last minute and toss just before serving.

If using frozen corn, place the kernels in the colander before draining the hot pasta over it to thaw.