Preheat your oven to 425°F (220°C).
Wash the broccoli florets thoroughly and pat dry.
In a large bowl, combine broccoli, olive oil, minced garlic, salt, and pepper.
Toss the broccoli until evenly coated.
Spread the broccoli in a single layer on a baking sheet.
Sprinkle red pepper flakes over the top if desired.
Roast in the oven for 20-25 minutes, or until crispy and golden.
Stir halfway through to ensure even cooking.
Remove from the oven and squeeze fresh lemon juice over the top.
Serve immediately while hot.