This first time I made and ate chicken marbella was with my cousin, Megan, and friend, Sarah. However since we were just getting together in the evening we hadn't marinated the chicken overnight. The chicken was still so delicious that I couldn't imagine how it would taste had it been marinated overnight so I had been eager to try it! For Andy's birthday dinner, since I knew of it a day in advance, I was able to prepare the chicken the night before and let it marinate over night. This recipe is right out of the Sliver Palate Cookbook and the only modifications I made were increasing the olives and prunes. After reading many reviews on this recipe I have learned that if you don't have all night, it's fine to marinate the chicken for 5 hours. I served this with cumin curry popovers and a fennel and apple salad. This dish is really easy to pull together and is great for dinner parties, enjoy!