Use high-quality olive oil - Since olive oil is the base, a good-quality extra virgin olive oil will make a huge difference in flavor.
Fresh garlic is best - Avoid jarred garlic for this recipe; fresh garlic gives the strongest and most authentic flavor.
Adjust spice level - Add more or less crushed red pepper flakes depending on your preference.
Add parmesan before serving - This keeps the texture fresh and prevents it from softening too much.
Make it ahead - You can mix everything except the parmesan and store in the fridge, then bring to room temperature and finish before serving.