Cavatelli and Broccoli

Bahan-bahan (4 porsi)

• 2 pounds broccoli crowns (cut into bite-size florets)
• ¼ cup extra-virgin olive oil
• 1 teaspoon kosher salt (divided, plus additional to taste)
• ¼ teaspoon ground black pepper (plus additional to taste)
• 1 15 -ounce can cannellini beans (or similar white beans, such as great Northern)
• 8 ounces cavatelli (or other tube-shaped pasta)
• 1 medium lemon (zest and juice)
• ½ teaspoon freshly ground black pepper
• 1 cup part-skim ricotta cheese (about 7.5 ounces)
• ¼ cup grated Parmesan cheese (plus additional for serving)
• ¼ teaspoon red pepper flakes (plus additional to taste)