I've seen breads from those in stores and bakeries, they often have raisins in them as panini described, I have also seen them with grated cheese.
the spelling is Moravian if you want to google. As panini says about being just in time, you could have a Moravian Love Feast, you could google that too.;)
also there is an Austrian dessert (cake) that is delicious from pans very similar, called Rehrucken. When I've had it it is chocolate and almond.
It is meant to mock a saddle of venison with bones.
You see pans like that that are not quite complete spheres for the rehrucken, the complete spheres like you have being more for bread, but you could use them for rehrucken too.
For the bread, I would think you could amend a pain de mie recipe if you have trouble finding authentic recipes, or seek out traditional recipes.
They look very nice, I have so many different molds as it is, but I am coveting them, especially in the quality level of the ones in the link.