Place the chopped broccoli in a microwave-safe bowl and add water.
Cover the bowl with a microwave-safe plate and cook on high for 2 1/2 to 4 minutes, until the broccoli is tender.
Carefully remove the bowl from the microwave, using oven mitts to avoid steam burns. Transfer the broccoli to a serving dish.
If desired, add butter to the broccoli, tossing to coat evenly. Season with salt and pepper to taste.