Oh I bumped into this a while ago. Thought it might fix itself for a reload(which didn't happen because I moved on to another household)
So I checked that just now, it seems my sim didn't have that social option, either. Curiously she's at the second milestone, which means she indeed DID talk to some folks about grilled cheese.
Even weirder I tried a older household of mine, with sims who had completed that aspiration, and they all had the social option... it's just weird.
I'm not sure if it has to do whether they had a grilled cheese recently, though.