citrus yogurt cake

I bought big tub of yogurt but wasn't thinking what's for.
I decided to make yogurt cake.
I made it before. but last time I made one was really dense & bit too heavy for me.

I used this recipe ( http://www.epicurious.com/recipes/food/views/231588)
reduced oil to 1/3 cup, added orange & lemon zest.
for glaze, I used grapefruit jam which I made few weeks ago.

cake was soft , moist. but not so much citrus-y as I expected.
jam is pretty tangy it self. but with cake quite mild for some reason.

over all, very easy & light & refreshing so I liked.
may be good with whipped cream or some kind of sweetened rich creme .