The first part of the inscription which translates as 'only poverty is free from envy' is a phrase which was used frequently, the more usual spelling of 'charet' being 'caret', and it usually ended with 'invidia' (some citations refer it to the proverbs of Seneca). 'In cor domini sui' translates as 'in the heart of its master'.
A charger in the Victoria and Albert Museum with a very similar central figure is illustrated by Bernard Rackham, Catalogue of Italian Maiolica (London, 1940), Vol. II, pl. 75, no. 482. The majority of dishes of this type show half-length portraits of women, rather than full-length figures.