There is some JSON on the page, which is really easy to parse in Shortcuts! 
If I understand your question correctly, this shortcut should do everything you want:
- Add all the ingredients to a list in Reminders (asked on initial setup of the Shortcut)
1b. Adds a note for every ingredient mentioning for which recipe it is. You can skip this of course - Create a note with the name of the recipe and the URL
This needs to be run from the share sheet on a web page, because it uses the JavaScript action from Shortcuts.
https://www.icloud.com/shortcuts/e5162583c2354513bdd95ec4e24fe428