Preheat your oven to 425°F (220°C).
Wash and dry the broccoli florets thoroughly.
In a large bowl, combine olive oil, minced garlic, salt, pepper, and red pepper flakes.
Add the broccoli florets to the bowl and toss to coat evenly.
Spread the broccoli in a single layer on a baking sheet.
Roast in the preheated oven for 20-25 minutes, turning halfway through.
Check for doneness; the broccoli should be tender and slightly crispy.
Remove from the oven and squeeze fresh lemon juice over the top.
Sprinkle with grated Parmesan cheese if desired.
Serve immediately and enjoy this flavorful dish!