Brown ground beef in a large nonstick pan, breaking it apart as it cooks. When there is no more pink left, add the water and taco seasoning. Cook and stir for 1 to 2 minutes. Let cool. Note: If there is a lot of grease, drain some off before adding the water and taco seasoning.
In a 3-quart glass bowl or trifle dish, layer the iceberg lettuce, the black beans, corn, and cucumbers.
Spread the cooled taco meat on top of the cucumbers.
In a medium bowl, mix together the sour cream, salsa, and lime juice. Spread on top of the ground beef.
Sprinkle cheese on top of sour cream mixture.
Make circles of tomato, black olives, red onion, and avocado.
Top with crushed Doritos and cilantro.
Serve right away or chill in the refrigerator until ready to serve.
