Duke’s Mango Barbecue Sauce   Author: Mike Wong – Duke’s Canoe Club Waikiki Recipe type: Saunce Cuisine: American Prep time:  10 mins Cook time:  30 mins Total time:  40 mins Save Print A definite Hawaiian flavor with this signature sauce from Duke’s. Ingredients 1 C Heinz Ketchup 2 C Mango Puree ½ C Brown Sugar 1 Tbs Rice…