crisp romaine apple walnut salad

I think I got this one from Martha Stewart years ago but I am not sure.
Use crisp, clean, cold romaine leaves, walnut pieces or halves, honeycrisp or fuj apples sliced thin, and other stuff--like carrots, cherry tomato halves, celery, etc. Toss together, add some olive oil, cider vinegar, a little sugar, garlic salt, salt and pepper to taste. Toss again.