Select the bottom surface of the pan model by clicking the surface with the black arrow cursor. Next, select the Push/Pull Tool (P).
NOW .. tap the Cntrl key. If you look at the Push/Pull Tool you will see a little + sign pop up next to the tool. What that means is that when you Push/Pull the surface/plane you are pushing against will remain where it was .. and a new plane will be created and pushed along.
Remember .. that curve starts just below the pin striping. So .. with the Push/Pull Tool .. with + .. PUSH that surface up to you see the New Plane at that point and release the mouse.