Remove the kale from the stems then give it a light chop.
Add the kale, garlic, and sea salt to the food processor then pulse until the kale is minced fairly finely.
Add the pepitas and lemon juice to the mixture and continue to pulse until the pepitas have been ground.
Stir the parmesan cheese into the pesto then store in an airtight container like a mason jar.
Notes
For best results when serving on pasta toss the pasta with a little olive oil first then add a few tablesoons of kale pesto - it will spread easier across the pasta this way.