
Bring a large pot of water to boil. Cook the rotini noodles according to the package directions. Drain, rinse with cold water until the pasta has cooled significantly, and shake off as much excess water as possible.
Transfer the pasta to a large bowl, cover, and refrigerate until ready to use.
Heat the olive oil in a large skillet over medium-high heat. Add the ground beef and cook for 8-10 minutes, stirring occasionally, until browned and fully cooked. Drain off any excess grease. Stir in the taco seasoning until thoroughly combined, then remove from heat.
Transfer the cooked ground beef to a medium bowl, cover, and refrigerate until cooled, about 45 minutes to 1 hour.
While the beef and noodles are cooling, make the dressing by whisking together the chunky salsa, sour cream, and Catalina dressing in a small bowl. Cover and refrigerate until ready to use.
Once everything has cooled completely, add the ground beef to the large bowl of noodles along with the shredded lettuce, cheese, tomatoes, red onions, and homemade dressing. Toss together to combine.
Mix in the crushed tortilla chips right before serving, or just serve them on the side so they don’t get soggy. Garnish with cilantro.