API include content of page children in one API call?

Kirby 3
1

I was wondering if there was a way to fetch fields/content from children of a page section, eg, with the starterkit:

/api/pages/notes?select=children returns:

{
    "code": 200,
    "data": {
        "children": [
            {
                "id": "notes/across-the-ocean",
                "num": 20180421,
                "title": "Across the ocean",
                "url": "https://kirby-starterkit.test/notes/across-the-ocean"
            },
            {
                "id": "notes/a-night-in-the-forest",
                "num": 20180625,
                "title": "A night in the forest",
                "url": "https://kirby-starterkit.test/notes/a-night-in-the-forest"
            },
            {
                "id": "notes/in-the-jungle-of-sumatra",
                "num": 20180731,
                "title": "In the jungle of Sumatra",
                "url": "https://kirby-starterkit.test/notes/in-the-jungle-of-sumatra"
            },
            {
                "id": "notes/through-the-desert",
                "num": 20180905,
                "title": "Through the desert",
                "url": "https://kirby-starterkit.test/notes/through-the-desert"
            },
            {
                "id": "notes/himalaya-and-back",
                "num": 20180926,
                "title": "Himalaya and back",
                "url": "https://kirby-starterkit.test/notes/himalaya-and-back"
            },
            {
                "id": "notes/chasing-waterfalls",
                "num": 20181005,
                "title": "Chasing waterfalls",
                "url": "https://kirby-starterkit.test/notes/chasing-waterfalls"
            },
            {
                "id": "notes/exploring-the-universe",
                "num": 20181031,
                "title": "Exploring the universe",
                "url": "https://kirby-starterkit.test/notes/exploring-the-universe"
            }
        ]
    },
    "status": "ok",
    "type": "model"
}
>

Is there a way to have the response include other fields, such as text and gallery:

{
    "code": 200,
    "data": {
        "children": [
            {
                "id": "notes/across-the-ocean",
                "num": 20180421,
                "title": "Across the ocean",
                "url": "https://kirby-starterkit.test/notes/across-the-ocean",
                "data": {
                    "text": ...,
                    "gallery": ...,
                }
            },

Or is it only possible through building a custom JSON response as per the cookbook: https://getkirby.com/docs/cookbook/templating/generating-json