Preparation Bring first 4 ingredients to boil in heavy small saucepan, stirring until sugar dissolves. Simmer until reduced to 2/3 cup, about 4 minutes. Transfer syrup to large bowl and refrigerate until cold. Add pineapple to syrup. Cover and refrigerate 1 hour. Add cucumber and next 3 ingredients to pineapple mixture; stir to coat. Line plates with lettuce leaves. Spoon salad atop lettuce. Sprinkle with sesame seeds and serve.
Preparation Bring first 4 ingredients to boil in heavy small saucepan, stirring until sugar dissolves. Simmer until reduced to 2/3 cup, about 4 minutes. Transfer syrup to large bowl and refrigerate until cold. Add pineapple to syrup. Cover and refrigerate 1 hour. Add cucumber and next 3 ingredients to pineapple mixture; stir to coat. Line plates with lettuce leaves. Spoon salad atop lettuce. Sprinkle with sesame seeds and serve.