Simple: Delete them.
Current best practices for food blogs are to use your categories properly, and completely delete all tags.
Categories and tags serve almost the same purpose, and require extensive setup to use effectively, including unique titles, descriptions and careful thought about what your audience values.
The majority of sites out there barely have enough content to use just categories effectively, so tags have no place.
Having empty categories or tags with no unique description, that are not organized based on keywords your audience uses, are useless.
Worse than that, they actually hurt your site because it creates hundreds of thin-content pages.
There's an easy way to test this: Go into your Google Analytics and Google Search Console and look at whether these tag pages are even being used.
Here's a good interview with Casey Markee on managing your site's content.