Cook the pasta according to package instructions. Drain and run cold water over the pasta. Set aside.
Brown the ground beef over medium-high heat in a medium skillet. When no pink remains, add taco seasoning and water. Bring mixture to a simmer, stirring occasionally, until all liquid is absorbed. Remove from heat and cool.
In a large salad bowl, mix together cooled pasta, cooled taco meat, grated cheese, tomato, lettuce, avocado, cilantro, and green onions.
Pour the French dressing over the salad and toss to combine.
Just before serving, add the crushed Doritos and toss once more.
Serve immediately.
