Brown the beef in a frying pan over medium-high heat. Take the pan off the heat, add the 2 tbsp. taco seasoning to the beef and mix well. Set aside.
Cook the pasta al dente, according to package directions. Drain the pasta and rinse with cool water to stop the cooking process.
Mix the dressing ingredients together and season with salt and pepper, to taste.
In a large bowl, combine the pasta and beef with the rest of the ingredients. Add the dressing and mix well.
You can serve right away or cover and chill for later. Garnish with chopped cilantro when serving. If desired, you can also crush some tortilla chips on top (when serving) to add some crunch.