Out any day now is “The Fragment on the Mountain: A Note on Didache 9.4a”. Neotestamentica 49.1 (2015) 175–188.
Here is the abstract:
This article suggests that Didache 9.4, which makes reference to a fragment that had been scattered on a mountain, and employs this image to refer to the eschatological ingathering of the church, should be understood as an allusion to a tradition held in common with the first and fourth Gospels of a mountainside feeding miracle performed by Jesus. Recognition of such an allusion both illuminates the obscurities of the text and provides a basis for understanding the Didachistic Eucharist as a proleptic participation in the messianic banquet.
If anyone has difficulty getting hold of this I can oblige.