Add toasted sunflower seeds to a food processor and process until chopped. Add other ingredients except for the olive oil and chop till combined. Slowly add 1/3 cup of the olive oil through the top. I typically like my pesto a little thicker for adding to pastas. If you like a thinner consistency or want to use as a dressing, add another 3tbsp or so till you reach your desired consistency.
If you'd like to spice it up, a few shakes of red pepper flakes will do the trick.
Notes
If you're not a fan of kale or arugula, you can use spinach leaves instead. Arugula and spinach sometimes make a nice, peppery combination if you add around 3/4-1 cup of each.
This recipe is dairy free, gluten free, and low sodium as is. Be sure to buy "roasted and unsalted" sunflower seeds. These are available at Trader Joe's.