I know it's called a Taco Salad, but humor me for a minute. There is something about cold hamburger that just doesn't turn me on. If you are okay with it just brown and drain a pound of hamburger instead of the steak. To be honest I can usually buy steak as cheap or cheaper than ground beef.
Mexican Salad Bowl
1 pound of steak, sirloin, flat iron, whatever is on sale
Season steak with salt and pepper, grill to no more than medium rare. Slice very thin and cut into 2-inch pieces.
In a serving bowl, combine all ingredients except the lettuce and tortilla chips. Chill. Add lettuce and crushed tortilla chips and toss.
Now tell me you really like cold hamburger better.