Preheat oven to 400 degrees F. In a large bowl, combine broccoli florets and garlic. Drizzle with olive oil and fresh lemon juice. Toss until florets are well coated.
Arrange the broccoli florets in a single layer on a large baking sheet. Season with salt and black pepper, to taste. Roast for 15-20 minutes, until cooked and slightly browned. Remove from oven and serve warm.