Bring a large pot of salted water to a boil. Add the pasta and cook to al dente, about 8 minutes.
Pour the cooked pasta into a strainer and rinse with cold water. Set aside while the remaining ingredients are prepped.
Add the ground beef to a skillet over medium heat. Cook until browned, about 7-10 minutes. Drain the fat from the cooked beef.
Add ⅔ cup of water and the taco seasoning. Return to the stove over medium low heat and cook, stirring occasionally, until the sauce has thickened. Remove from heat and let the beef cool for 10 minutes before adding to the pasta.
Add the cooked pasta to a large bowl. Add the beef and tomatoes to the pasta and stir to combine. Add the cheese, green pepper, onion and cilantro and stir again.
Finally, add the lettuce and Catalina dressing and stir until evenly incorporated.
Serve immediately, garnished with corn chips or Doritos.