Pour cider into large high-sided skillet set over medium-high heat; bring to a boil. Add broccoli florets, Brussels sprouts and salt; toss to combine. Cover and reduce heat to medium-low. Steam vegetables 8 to 10 min. or until tender. Toss with butter to coat.
Transfer to serving dish. Drizzle with maple syrup and sprinkle with cranberries.
Substitute hard cider with regular cider or apple juice.