Add the ground beef to a medium skillet and cook over medium heat until browned. Drain the grease. Add the taco seasoning, and water. Bring to a boil, then cook over low heat for 5 minutes.
Fill a large pot halfway with water, and bring to a boil. Add the noodles, and cook until al dente. Drain the water, and run cold water over the noodles until they are cooled.
Add the noodles and dressing to a large bowl and toss to coat.
Add the cooked meat, tomatoes, black beans, olives, cheese, cilantro, and crushed Doritos. Gently toss to combine.
Serve and enjoy!