Creamy Broccoli Soup

1. Heat oil over medium heat in a large nonstick saucepan. 2. Add onion and garlic, reduce heat to low, and cook until softened, about 7 minutes. 3. Add broccoli, salt, and a pinch of pepper; stir well to coat. 4. Add broth and lemon juice; raise heat and bring to a simmer. Partially cover, reduce heat to low, and simmer gently until broccoli is very tender, about 25 minutes. 5. Transfer soup to a blender and puree, in batches if necessary, or use a hand blender. 6. Serve hot, garnished with a small broccoli floret, if desired.