To make pineapple boats, cut pineapples in half lengthwise through crown. Remove fruit from shells with curved knife, leaving shells intact. Remove core from each pineapple half; discard. Coarsely chop pineapple. Place pineapple with juice in glass bowl; reserve for salad and dressing. Refrigerate hollowed pineapple shells.

Place crabmeat in medium bowl; add 1 cup reserved chopped pineapple, chickpeas, parsley and walnuts. Gently stir to combine. Cover and refrigerate until ready to assemble salad. Prepare Pineapple Poppy Seed Dressing.

To assemble salad, line pineapple shells with lettuce leaves. Spoon crab mixture into shells. Toss apples with 2 tablespoons reserved pineapple juice; drizzle with Pineapple Poppy Seed Dressing. Garnish pineapple boats with apple slices, green onion and red onion.

Place oil, pineapple juice, pineapple, vinegar, onion and salt in food processor or blender; process to combine.

Add poppy seeds; process using on/off pulsing action until mixture is blended. Refrigerate until serving.