Best use of the word "basically"

A typical sentence from "Inherent Vice," typlifying the pleasures of that book:

Next morning -- ocean smell, fresh coffee, a cool edge -- Doc was in Wavos, going through the Sunday Times to see if there was anything new about the Wolfmann case, which there wasn't -- though of course with twenty or thirty different sections you never knew what might be hiding among the real estate ads -- and was about to dig in to a specialty of the house known as Shoot The Pier, basically avocados, sprouts, jalapenos, pickled artichoke hearts, Monterey jack cheese, and Green Goddess dressing on a sourdough loaf that had first been sliced lengthwise, spread with garlic butter, and toasted, seventy-nine cents and a bargain at half the price, when who should stroll in, who else, but Shasta Fay.