Bring a large pot of water to a boil and add the rotini. Cook according to package directions. Drain and rinse with cold water.

While the pasta is cooking, brown the beef over medium heat, crumbling it as it cooks. Drain the grease and add the taco seasoning, along with ¼ cup of water, to the beef. Stir to coat the beef and continue cooking for 5 minutes or until most of the liquid has evaporated.

Add the cooked pasta, seasoned beef, beans, corn, onion, tomatoes, and cheese to a large mixing bowl. Stir to combine.

Add the Catalina dressing and sour cream to a small bowl and whisk to combine.

Pour the dressing over the pasta mixture and stir to coat.

If serving right away, add the Doritos and lettuce and stir to combine. Garnish with cilantro.

If you’re making in advance and will be serving later, cover with plastic wrap and refrigerate until ready to serve. Stir in the Doritos, lettuce, and cilantro just before serving for the best texture.