Is there a "best" method for home treatment of plantars mosaic on the foot?

Best treatment? Best treatment is the one that works without cost or pain or risk. There are so many treatments for wart because there is not a best treatment. Try treatment from the pharmacy and if that does not work see you podiatrist to clear this up.
Plantar wart therapy. If one means plantar warts when he says "plantars mosaic", the over-the-counter treatment is wart removal acid. It comes as a bottle of acid or as acid in a "bandaid" form. The acid slowly dissolves skin cells. Since plantar warts can be deep, a better way to treat them is to have a doctor freeze them. An over-the-counter wart freezing spray was sold a few years ago, but was not cold enough.