Place chopped broccoli in a microwave-safe bowl and pour water over the top.
Cover with a plate and microwave on high for 2 ½ to 4 minutes, until broccoli is tender. Be careful when you remove the broccoli from the microwave. The steam will be hot!
Transfer broccoli to a serving dish. If desired, top with butter, tossing to coat. Sprinkle with salt and pepper to taste.