Getting Data from Elastic Stack with REST with Scroll

There have been a few different threads like this but I believe the solution lies in creating a Power Query function that you call recursively. Here is an example of functions and recursion on a completely unrelated topic but might get you there:

https://community.powerbi.com/t5/Community-Blog/Using-Recursion-to-Solve-Hex-to-Decimal-Conversion/ba-p/34153

Thanks for pointing me in the right direction.

For anyone else that runs into this problem, here's the first iteration of a working function: 

let
    RecursiveElasticFetch = (queryUrl, scrollUrl, scrollId, counter) =>

    let
        Counter = if (counter = null) then 0 else counter,

        Results = if (scrollId = null) then            
            Json.Document(Web.Contents(queryUrl))
        else
            Json.Document(Web.Contents(scrollUrl&scrollId, [Headers=[MyHeader=Text.From(Counter)]])),

        ParsedResults = Table.FromList(Results[hits][hits], Splitter.SplitByNothing(), null, null, ExtraValues.Error),

        Return = if (Counter < 10) then
            ParsedResults & RecursiveElasticFetch(queryUrl, scrollUrl, Results[_scroll_id], Counter+1)
        else
            ParsedResults 
    in
        Return 
in
    RecursiveElasticFetch

For the parameters:

queryUrl - The query URL that kicks off the search: http://elasticsrch-dev:9200/intranet*/_search?scroll=1m&source={....}

scrollUrl - The URL used for subsequent searches (the scroll id is appended at the end): http://elasticsrch-dev:9200/_search/scroll?scroll=1m&scroll_id=

scrollId - Used to pass the scroll_id to subsequent calls. Leave it blank for the first call

counter - Used to limit the number of iterations. Leave it blank for the first call.