Didn’t have a ton of time to test this fully this morning, but in theory, this should work:

Try experimenting with option sets https://a.cl.ly/ApuGKxQw

Have all timeslots :Filtered down to only those who match the current kitchen’s availability https://a.cl.ly/WnulRq2N

Each option could have a standard time, and time expressed as decimal https://a.cl.ly/z8u4DkAk

Hope that helps steer you in the right direction!