1 1/2 cups fresh blueberries
1 cup diced fresh pineapple
3 oranges - peeled, segmented, and chopped
1 honeydew melon - peeled, seeded and cubed
3 tablespoons fresh lemon juice
1 tablespoon lemon zest
1/4 cup white sugar
1 (16 ounce) can pineapple juice
1/4 cup vanilla low-fat yogurt (optional)
4 sprigs fresh mint leaves for garnish