baked potato in log burner

[green thing]

We have a similar wood burner. We've have two flat metal bars across the ledges which look the same as yours.
We then put a grill or baking tray on them.
We do veg in a foil bag with a bit of water.
Also done fish in the same way.
we also cook on the top as well and always have a kettle on top.
It never quite boils but save using the electric kettle.
Its made a big difference in the fuel bills since we always cook from scratch.
Baked potatoes always taste better somehow from the stove.