This recipe looks great, but is there a good fall fruit substitution for rhubarb?

I made it today with apples that I'd browned first in a little butter and sugar and then added a squeeze of lemon juice to the mix before putting it on top of the cake. It was really good! And the additonal lemon juice was actually really nice with the apples :)

Another idea: persimmons!

Grapes might be good, but I wonder about pomegranates. I think I would use orange peel and cardamom as the seasonings.

Roasted plum would probably be nice too

There's lemon zest in the recipe and the lemon zest will complement just about any fruit.

Apples, pears? I know a tart apple would be really good in this cake.