To make Vanilla-Apple Syrup:

1. Place apple juice and lemon zest in pot. Slice vanilla bean in half and scrape seeds into juice. Add bean to pot as well. Bring to a boil over medium-high heat. Reduce to medium-low, and simmer 30 minutes, or until mixture is syrup-like and reduced to 1/3 cup. Remove lemon zest and vanilla bean, and cool to room temperature.

To make Fruit Salad:

2. Toss mangoes, strawberries and blueberries with Vanilla-Apple Syrup, and serve.