1. Place kale pieces in large pot with 1 1/2 cups water, cover, and heat over medium-high heat. Cook 5 minutes, or until kale is wilted but still bright green, tossing occasionally. Add more water while cooking if necessary. Drain, reserving cooking liquid. Cool.
2. Blend pecan pieces and garlic cloves in food processor until finely chopped. Add cooled kale, and blend until thick paste forms. Add Parmesan, and blend until smooth. Add oil and 2 Tbs. kale cooking liquid, and blend until smooth, adding more liquid if necessary to obtain desired consistency. Season with salt and pepper, if desired.