Custom page query

Hi guys

This is my 2nd topic ever so I apologize in advance if it’s in the wrong forum 🙂

I’m using WP for a food catering business, so I’m trying to create a custom page, which would list the different menus.

The way I would like to have it organized, is 1 parent category, which has 4 child categories, which in turn have posts (the posts will be the various dishes). This blueprint will be 1 section and I need 4 of these on 1 page.

I would like the the 4 child categories to be displayed horizontally, with the posts listed below each child.

I’ve attached an image of what I’d like it to look like in the end, but am struggling to bring together the code I’m looking for.

Any help with this would be appreciated.

Thanks