Bring a large pot of water to boil. Cook pasta, al dente, according to package instructions. Do not overcook.
Drain and rinse pasta with cool water. Allow pasta to continue draining in strainer while you prepare remaining ingredients.
Preheat a large skillet over medium-high heat and brown ground beef until no longer pink. Drain if desired.
Add taco seasoning and water (according to packet instructions) to the ground beef.
Cook for 3-5 minutes, while stirring, until sauce is thick and the meat is seasoned. Set aside and let cool.
Once the meat is cool, add to a large bowl. Combine with cooked pasta, corn, tomatoes, beans, peppers and onions. Toss gently to mix.
Slowly pour the Catalina or French dressing over the mixture. Toss again to coat the ingredients. Chill before serving.
When ready to serve, top with colorful tortilla strips, chips, sour cream, or shredded cheese.