On Friday night we had friends over for dinner.  I made flank steak marinated in cumin and sumac.  This recipe is so easy, and so good.  The marinade is also used to dress the accompanying arugula and feta salad.  The first time I tried this dish, I didn’t have sumac, so I simply left it out and made extra marinade (I wanted more than called for in the recipe).  It was delicious, but quite lemony, so this time I halved the lemon juice and added the sumac.  The sumac really improved the flavor.  Watermelon is perfect to serve with this.  And for dessert…chocolate cake.