Passion fruit concentrate has become my favorite "secret ingredient"...I use it to make a citrus sauce for halibut steaks (water, sugar, cracked black peppercorns, honey, lemon and orange juice and zest, and passion fruit concentrate)--serve the fish on a bed of arugula, pour the sauce over, garnish with julienne strips of cucumber and slivered almonds, serve alongside jasmine rice, and your guests will feel they've landed in Hawaii...I also add it to Italian Cream Cake, replacing a couple of tablespoons of liquid ingredients with concentrate, and add it to the buttercream frosting as well in place of milk. I've used this approach to make everything from a three-layer cake decorated with orchids to bite-size mini-cupcakes dusted with orange sugar. My husband puts it in martinis with pineapple, and I mix it with Hypnotiq for a gorgeous aqua cocktail. Everyone always wants to know what that exotic flavor is, but I only reveal the secret to my best friends...