When are the Tomatoes sliced?

In the video, Erin shows two different versions of a tomato pie/tart/galette. The photo shows the first version she demos in the video, which uses unroasted tomatoes that she slices just before placing on the filling. The written recipe is for the roasted version she demos secondly in the video. That calls for cherry or grape tomatoes which are roasted whole, until they collapse and some of the liquid evaporates. It's two different versions of the tart, really. I think using the sliced version in the picture and a recipe for whole roasted gets things a bit confused. At any rate, the slices don't get roasted, and you slice them and place them on the tart filling in a raw state.