Can a Sorcerer multiclass use Metamagic on a Ritual Casting?

I have a character who multiclassed from a Sorcerer into a Druid. She has the Subtle Spell metamagic, and has prepared the Purify Food and Drink spell via her druid spellcasting feature – this spell has the ritual tag. She is a guest at a feast, but some nefarious individuals are also present there. For a number of reasons* she wants to cast purify food and drink as a ritual, and spend 1 sorcery point to use subtle spell on this casting – can she do this?

To be more general, Can sorcerer-multiclass characters use Metamagic options on ritual castings from other spellcasting classes? I see nothing that would prohibit this**, but I want to make sure.

Relevant excerpts:

Subtle Spell: When you cast a spell, you can spend 1 sorcery point to cast it without any somatic or verbal components.

Druid Ritual Casting: You can cast a druid spell as a ritual if that spell has the ritual tag and you have the spell prepared.

* Wanting to avoid being poisoned, save her spell slots for a possible fight, and simultaneously not offend the hosts by insinuating that they would allow anyone being poisoned at their feast by noticeably checking.

** Apart from the awkward 10 minute pause before eating, but that can be done before the meal if the exact time of serving is known or controlled.