"Begin with an individual," F. Scott Fitzgerald said in that long ramble of a story, The Rich Boy, "and before you know it you find that you have created a type; begin with a type, and you find that you have created--nothing. That is because we are all queer fish, queerer behind our faces and voices than we want any one to know or than we know ourselves."
You meditated on this information a good, long time as a young man, forging a lifelong fondness for the craft you believed you could learn from him and the actual ache of awareness you eventually did get from him.
The Rich Boy seduced you into the belief that you could write about the people he wrote about, and while you might have eventually been able to do so, it was another story of his, Babylon, Revisited, that pushed you into awareness of what you thought you'd learned from the quotation about characters. Babylon, Revisited was the essential story of Fitzgerald, a man who was once something he wanted to be, had something he wanted to have, and because of excesses and lack of discipline, had lost the innocence of what had brought him to power in the first place. Now, with rigid self-discipline, he could revisit but only briefly, could catch glimpses of what he once was and once had, more as a visitor than a full-time resident.
Thus your standards fall into place from reading and eating, two significant appetites that have grown under your management. Meals want honesty and reference points; characters must be presented so that their reference points somehow radiate or bulge or cry out beyond the protective presentation of cliche.
With that in mind, the delivery of the pizza may remain ordinary in context of the story, but it will, because of its influence on your choice of words, your cadence of presentation, the responses of your more significant characters transform ordinary the same way dialogue transforms the predictability of conversation.
You once advocated to a rather stunned class the application of Heraclitus to your pizza delivery person in that, as you observed, you cannot deliver the same pizza twice. That was years ago. You still hear from students who remembered that lecture as opposed to not hearing from students who didn't remember the more ordinary lectures.