Grilled Cheese Aspiration?

I have a Sim with the grilled cheese aspiration, but she has already worked through all the levels except for

I just played her, and there were no glitches. When I worked through the levels previously, it proceeded easily. I'm pretty sure she petted and fed the cat while I was working through the levels. The aspiration could be bugged now. Or, if you have any mods or cc in your game, there could be a conflict. If that's the case, you might want to try temporarily removing all mods and cc to see if that helps.

It sounds to me like you're trying to unlock the aspiration. I would recommend eating 3 sandwiches with as few interruptions as possible, and as quickly as possible. Don't wait for your Sim to get hungry. I've had several Sims who made an 8-serving platter of grilled cheese, ate all 8 sandwiches without eating anything else, and still did not unlock the Grilled Cheese aspiration, so I'm fairly sure there is a time limit involved. On the other hand, I just had a Sim eat 3 sandwiches in a row and unlock the aspiration, so it is working. The only interruption was washing the dishes after the second sandwich.

My Sims got interrupted by washing dishes too, and that worked. Try turning off autonomy while you're doing it?

I think they have to eat 3 in a row to unlock the aspiration. I usually queue them up to eat 2 more after eating the first one and try to cancel out any interruptions that might pop up in between.