For the dressing: Mince the garlic with a knife and then sprinkle about 1/8 to 1/4 teaspoon of salt on it and mash it into a paste with a fork. Chop the parsley, chives and basil very finely and add to the garlic.
In a bowl, combine the garlic mixture, mayonnaise, sour cream, Parmesan, cayenne, paprika and Worcestershire, tasting frequently and adjusting the seasonings as needed. Chill for a couple of hours before serving. Thin with a little milk before using if desired.
For the salad: To assemble, layer chunks of the iceberg lettuce on a platter. In lines, lay on the grated cheese, shredded carrots and cucumber slices, and sprinkle the sunflower seeds over the top. Drizzle on the dressing and serve.