Place the broccoli in a large microwave-safe bowl. Add ¼ cup of water.
Cover the bowl with a microwave-safe plate. Microwave on high until tender-crisp, about 4 minutes.
Remove the plate carefully - hot steam will escape. Drain the broccoli in a colander, transfer it to a bowl, and season it with kosher salt, freshly ground black pepper, fresh lemon juice, and melted butter.
Serve immediately.
Video
Notes
I often buy a bag of pre-washed broccoli florets. But it's not difficult to wash and dry the broccoli and cut it into florets. If you use a bag, the florets will come in different sizes. Chop the biggest ones to ensure they are all about the same size.
Avoid overcooking the broccoli. Microwave ovens vary. It's better to undercook the broccoli a little than to overcook it. So start checking after 4 minutes. You can add 30-60 more seconds if needed.
Keep the leftovers in the fridge, in an airtight container, for 3-4 days. They won't be as good as when served fresh. They tend to become a little soggy. Reheat them gently, covered, in the microwave at 50% power or in a 350°F oven, or enjoy them cold like antipasti. Lightly coat them with olive oil spray if using the oven.