I am wondering how to translate the following sentence into French:
"Explain to me what you were thinking".
I am assuming here that we are using "penser" with "à", i.e. the direct question here is "à quoi pensais-tu?" (what were you thinking?).
I am not sure as to how to express this as an indirect question. I was thinking along the lines of:
"explique-moi ce auquel tu pensais" or "explique-moi où tu pensais"
But I am pretty sure both of these are incorrect so I would really appreciate some help.