I regularly ask them if they'd like anything else instead.
They like everything to remain the same always for the whole of eternity 
You'd think they'd be bored of exactly the same lunch, day in, day out but no.
When they had school dinners I am told they had a potato. Every day.
This is clearly an improvement
No, I won't be switching to them making their own packed lunches. If it is about them knowing how to make a sandwich, they do. They can. They will. They have sandwich making skills (although - see 'peanut butter and marshmallow' above!)
Everything they do requires input. It requires me to instruct. To watch. To manage. To direct. To talk and walk them through it until they can manage it with remote supervision (remote supervision is as independent as it gets. It means they are doing it for and by themselves but you are aware of it and ready to step in if required). They have household tasks that they do. I am happy with those. I bring in additional ones as appropriate so that when they transition to adult services they will have a number of relevant skills.
They are currently eating the breakfast they made themselves.
Making sandwiches is a dull task repeated weekly and I just want to do it. Just a simple task I can get out of the way in a way that is easy and quick. For me. Get them in the freezer with minimum hassle and mess. If I was incapacitated for any reason, they would be able to make their sandwiches.
I can't remember who asked if the rolls were the size of a subway. No.
But if you're anything like me, it's hard to visualise inches. (there's a joke in there somewhere 
) so I took this.