Sauté nettle leaves in olive oil over medium heat for about 7 minutes, stirring and flipping regularly with a spatula. Remove from heat.
Juice lemon and grate parmesan cheese. (Zest lemon first if it's organic and you want to use the zest as a garnish.)
Add all ingredients to blender and puree until smooth. You may need to scrape sides with a spatula and re-blend 1-2 times.
If using as a dip, recommend serving warm or at room temperature. If using as a sandwich spread, it's good chilled. Store in covered glass containers in your fridge for up to a week.