Looking for mangas where the focus is working in a restaurant!
I don't want anything too dark and depressing, some drama is ok but I'd prefer to be on the more light hearted side.

I've read A LOT of mangas so please give me a lot of interesting selections!

Buuump

If you've read A LOT of manga, then I imagine you're already familiar with the following titles:
Ristorante Paradiso
Working!!
Three Stars no Specialite
Oishii Ayakashi
Shiawase Restaurant
Absolute must read: Shinya Shokudou

Bambino!
Rokuhoudou Yotsuiro-Biyori - Not scanlated, but is getting an anime soon.
Momomoke Restaurant
Isekai Shokudou - I found the anime incredibly boring, but it has plenty of fans, so...
Boku to Furusato Restaurant
Gokuraku Cafe

Also seconding Shinya Shokudou. What a shame this isn't getting scanlated any more! It does have an ongoing live action adaptation, though I haven't watched it.

Atsu Atsu Trattoria
Mixed Vegetables

Bumping!

Oishii Kankei
https://www.mangaupdates.com/series.html?id=7392

Kachuu Hana but it's Complete -Due the Author pass away
https://www.mangaupdates.com/series.html?id=17281