[gatsby-source-contentful & gatsby-transformer-remark] Option(s) to set what component to render as?

[mwskwong]

So, I would like to use gatsby-source-contentful and gatsby-transformer-remark with MUI (previously known as material-ui). By default, gatsby-transformer-remark will render markdowns as basic HTML elements (e.g. links to a). Yet, I want it to render as MUI components (e.g. links to Link).

Is that possible?