Some very fussy customers cannot live without this simple salad. Our version of this classic is very Italian, with a dash of Tabasco for a lick of heat.
Pour the water into a 4-quart stockpot and add the sliced onion, lemon half, and bay leaf. Bring the water to a simmer, and simmer for 20 minutes.
Meanwhile, prepare the calamari by separating the tubes and tentacles. Rinse the tubes under cold running water and pull off any quills, if not already removed. Cut the calamari into one-quarter-inch-thick rings.
Add the calamari to the simmering water and cook for 5 minutes. (It will turn opaque.) Drain in a colander, remove the onion, lemon, and bay leaf, and let cool for 10 minutes.
While the calamari cools, mince the garlic and put in a large ceramic or glass bowl with the olive oil, juice of the 4 lemons, parsley, Tabasco, and I pepper to taste. Add the calamari and toss well to combine. Best served within 1 hour of finishing.