Olive oil in desserts?

So Helen was telling me today about the MasterChef website, which apparently has the recipes for some of the recipes they use on the show (I don't watch TV). And she was also saying that they have an interesting recipe for Chocolate Mousse, which involves evoo (or perhaps just olive oil?) So I found the MasterChef site and finally found the recipe here at the Ready steady Cook site here. Apparently this recipe has done the rounds with this chef!. I'm going to give it a go soon - just to get past the issue I have about evoo and desserts. Weird. I'll let you know how it goes, of course!