Steps
1. Heat the olive oil in a skillet over medium heat.
2. Add the minced garlic and sauté until fragrant, about 30 seconds.
3. Add the broccoli florets to the skillet and stir-fry for 3-4 minutes, until they are bright green and tender-crisp.
4. Stir in the lemon zest, lemon juice, salt, pepper, and red pepper flakes if using.
5. Cook for another 1-2 minutes, mixing well to coat the broccoli.
6. Remove from heat and sprinkle with grated Parmesan cheese if desired.
7. Serve hot as a main dish or side.