Cook the pasta in salted water according to package directions, until al dente, then drain and rinse with cold water to cool down the pasta.

Meanwhile, brown the ground beef in a large skillet over medium heat. Drain any excess grease. Add the taco seasoning and water (see packet instructions for instructions).

Add the beef, pasta, black beans, corn, tomatoes, olives, peppers, jalapenos, cilantro, cheese and lettuce to a large serving bowl. Toss to combine.

In a jar, combine the mayonnaise, taco seasoning, lime juice and water. Shake until smooth.

Pour the dressing over the salad and toss to coat. Garnish with crushed Doritos.