01 - In a large skillet over medium heat, cook ground beef, breaking it apart with a wooden spoon, until fully browned. Drain any excess fat.
02 - Add taco seasoning and water to the browned beef. Stir well to combine, then simmer for 2 to 3 minutes, allowing the mixture to thicken. Remove from heat and let the meat cool slightly.
03 - In a large salad bowl, layer romaine lettuce, cherry tomatoes, red onion, black beans, corn, and shredded cheddar cheese.
04 - Gently add the slightly cooled taco beef over the salad mixture.
05 - Just before serving, add the crushed Doritos and your choice of ranch or Catalina dressing. Toss gently until ingredients are evenly coated.
06 - Serve immediately while the Doritos are still crisp.