I tried again this afternoon.
I started with adding some Date syrup. I don't have any dates, but I do have a jar of date syrup (which, like a lot of items in my store cupboard, I bought for something in particular and then couldn't remember what, so it never got used).
Fortunately, I had a whole bottle of date syrup, and I'd bought a 1kg bag of oats, so I cleared up and tried again.
Attempt two looked promising. I tried some as I sieved it out. I realised I'd forgotten to add oil.
I might try again a bit later.