"You might try, 'Unaccountably returned to this world alone in my body, I heard about your thoughtfulness regarding my remains, and am deeply appreciative for your faith in my basic nature and comprehension of what I would have wished. I am grateful for the more formal posthumous respects our other colleagues wished to bestow, but would like you to know that you were entirely right about my desire to be of service and make up for what was done with my hands against my heart's will, and for your generous understanding you will be forever in my thoughts,'" he suggests helpfully.
"Is it?" he repeats, raising an eyebrow, and then looks amused. "I daresay the more conventional three-quarts of the student population thought you were being bullied," he allows, and then lets a corner of his mouth slide up.
He considers this. "Yes. We'll have one when both potions are on the simmer. Shall it be an Italian Flag salad, or an Avostraw?"
"Apparently there used to be a cafe where there's now an amusment park half-built and abandoned," he explains. "Run by certain people who," he looks doubtful, "I'm assured are no longer here. Black showed me a penstruct* of it."
* Penstruct: A word I have just made up to describe magic Esinde made up, meaning a semi-physical snapshot of a memory that one doesn't have to nosedive into a silver bowl to see. Like most insubstantial constructs we've seen in HPverse, it looks like smoke. [ETA]: ARGH! I was sure I'd posted this!