I also had only iceberg lettuce.I did not include radishes and celery. Substituted powdered onion spice instead of green onions and did add a bit of mayo. I used small frozen shrimp. I didn't end up measuring ingredients. It was good, nice change from regular salad or spinach salad.

This is a wonderful base recipe to use and then tweak it to suit your tastes. I use the ingredients listed, (though I use iceberg lettuce, not romaine), and I add half a bag of shredded salad carrots. I also use the shrimp you buy at the fish counter for salad OR for a special treat I buy the small or medium shrimp that has the tails on and I just remove the tails and toss the shrimp in with the other ingredients. I then add salt and pepper and a small amount of mayonaise. (has to be mayo, the real thing, and not too much, you want to coat it lightly). Go easy on the onions, and chop the radishes nice and thin. YUM-O!