Awww woo yeah, if I can grind normal oats I'm definitely giving this a go and the variable ingredients are great for times like this! I'm venturing out to the supermarket later, and then hopefully we can try it in the next few days. Hopefully I'll get it to hold together without any maple syrup, but I will let you know how it goes - I might even go all out and make myself a matching normal unhealthy upside down cake with any left over fruit ;) if its okay with you, i might even do a post linking back to this one (if it turns out well enough, this might be too optimistic lol)
Edit: forgot to ask what the rough size of the cake tin is!