Last time that EldestCub made crumble here (as opposed to last time he made it anywhere, when he server up apple crumble for 10 YACFers in Whitby with a little bit of help) he felt that the quantity of topping seemed excessive for the available fruit. So used a little over half of it, to give a roughly 40:60 fruit to topping ratio, and we stuck the rest of the topping in a poly bag in the freezer. Which I got out of the freezer this morning and left in the fridge.
Today as they were chomping thru their Mummy Wednesday takeaway tea (Chish and Fips, since it was the big'un's turn to choose) I chucked a couple of perilously overripe nanabas in a dish and squidged them up a bit then added a handful of sultanas and a few chopped up dried apricots and stuck the topping on top, with a sprinkle of extra cinnamon. EldestCub was despatched to the audax control over the road to buy a pot of cream while his little bro was still eating his sossidge'n'scraps. Nae faff v quick pud.
Got the seal of approval!