here is a step by step guide on how to inlay a strike plate. 

start by marking around your strike plate then use a chizel to carefully remove wood from inside the line.

keep checking to see how the inlay fit's

fill the hole with some 5 min epoxy

then push the inlay into the hole. 

then wrap it with tape, you could also use some string.

once dry remove tape/string and sand it with some 180 grit sandpaper until it is level with the wood. then rub it with some wire wool and add a polish.
SS