Hey TCaptain, the gastrique is simple. It is just adding an incredible amount of flavor to whatever BBQ sauce you want to use. You can use whatever fruits you desire, I personally like Mango, strawberries, blackberries, peaches and pineapple. I would stay away from using bananas because of the texture. All you are doing by making a "Gastrique" is just adding liquid as well as vinegar + the fruit and then reducing it down til it gets a nice syrupy consistency. Once you have accomplished that, you just pour the mixture through a strainer into your bbq sauce, and mash the fruit into the strainer as well. What you should get is a nice smoky/spicy bbq sauce at first followed by the light and subtle fruity notes in the back of your palate. It is great on Pulled Pork, Ribs and chicken. I'm grilling some chicken legs tonite and using the last of the this sauce to baste it with. Good luck with it and please be sure to share your results