Time sheets for projects

Hi all,

I have a board that captures all projects with sub-items as deliverable which is working great - however what i am looking to do now is be able to setup a form that practitioners can complete time sheets.

My initial thoughts were that time sheets could be setup via another board and brought together through a dashboard, but the issue i have is how when submitting a timesheet they practitioner can nominate the project from the other board.

Any advice would be great