Brown beef in a large skillet and drain excess fat.

Add chili powder, cumin, garlic powder, salt and water and simmer until thick, about 4 minutes.

Let the beef cool for 5 minutes while arranging lettuce in six shallow bowls.

Divide beans, tomatoes, seasoned beef and cheddar over the lettuce.

Add crushed corn chips immediately before serving.

Serve with mild salsa and sour cream for spooning over each bowl.