I don't eat meat either so when we last went (in January) I had a fruit and cheese plate there, but we weren't on
DDP at the time so I can't tell you if it is an option on the plan. It was good, though, albeit small. It had apple slices, grapes, a couple kinds of cheese, some crackers, and walnuts in it.
When we have been on DDP before I know we were allowed "one savory and one sweet" for our CS credit, but that was before I gave up meat so I recall getting another type of sandwich then.
I do believe they also have a tomato basil mozzarella sandwich. Pretty sure I've seen that, but I'm not a tomato fan so I've never ordered it.
In the morning I would bet you could get a croissant without the meat on it, just egg and cheese.
Personally I think a stop in there for one of the sweets is totally worth a use of a snack credit by itself in case you don't find a sandwich you like to use the CS credit for.