As noted above, this cake took me almost 1 1/2 hours to bake off and was cooked through. A friend made it and found that it took her almost 2 hours. But following the suggestion to tent with foil totally helped. It is a very moist cake, so even if the skewer or toothpick comes out with a few bits on it, I would be content with this- you don't want the edges to totally dry out waiting for a clean toothpick. I found that the cake settled and the moist bits in the centre were just fine!
Having said this, I may try this in a 9x13 baking pan next time- the batter will have a bit more room to spread out, making it a tad thinner, but making it quicker to bake up. And more surface area for decorative apple slices. As to the apple slices: why not try a pear, figs, or even an orange sliced thinly? Or what about grapes? Not sliced of course! This cake lasted a good week for us! All that olive oil really keeps it safe!
Adapted from Sunday Suppers by Karen Mordechai