Hi Alex,
I’ve created a shopping list module that relies on @bugsounet MMM-GoogleAssistant module.
The module uses voice commands to add items to a shopping list, organizing each item as a bullet point on your mirror. There is also a component that hosts a local web server that you can access by phone and download a PDF of the items currently on your list. Once you’ve gone shopping, you can come home and tell the mirror to clear the shopping list.
Check out my repo: https://github.com/miguelrflor/MMM-ShoppingList.git