Ingredients

• 2 pounds broccoli
  
• 2 small heads garlic
  
• 9 tablespoons extra-virgin olive oil, divided
  
• 1 ¹/₄ teaspoons kosher salt
  
• ¹/₂ teaspoon freshly ground black pepper
  
• 2 scallions, both white and green parts thinly sliced
  
• 1 bunch flat-leaf parsley, roughly chopped
  
• 1 serrano pepper, seeded and thinly sliced
  
• 3 tablespoons freshly squeezed lemon juice
  
• 3 teaspoons lemon zest
  
• 1 handful shaved Parmesan (optional, but recommended)