Wash broccoli and cut into small florets. Steam in a microwave steamer or over boiling water until barely tender and still bright green.
Place olive oil in a skillet over medium heat. Add garlic. Sauté, stirring frequently, just until the garlic starts to soften. Add water, and the cayenne if desired. Simmer for 2 minutes.
Place the broccoli in a large serving bowl.
Pour the garlic mixture over it, mixing gently to coat. Serve hot or cold.
