In a saucepan with a steamer insert, bring a few inches of water to a boil. Place the broccoli on the steamer basket and cover with the lid. Steam for 1 minute. Transfer broccoli to a large plate in a single layer and allow to cool.In a large bowl toss together broccoli, apples, currants, nuts and red onion.In a small bowl whisk together dressing ingredients. Taste and add more maple syrup if you like the dressing sweeter. Pour over broccoli mixture and toss until broccoli is well coated.Let sit for 30 minutes so that broccoli can absorb some of the dressing.