Lemon cake with passion fruit syrup

I've admitted that this blog has had its share of lemon tarts and bars, so I won't even mention the massive amount of lemon cakes, right? :D
Lemon cakes are my favorite cakes, and I pretty much always have lemons around, therefore it's an easy choice for me. This time, however, I've more than satisfied my constant cravings for sour flavors by topping a lemon cake with a passion fruit syrup: