1. Heat pecans in a medium-size nonstick skillet over medium-low heat, stirring often, 5 to 7 minutes or until lightly toasted and fragrant. Remove from skillet. Let cool 5 minutes. Stir together pecans, parsley, and zest.
2. Cook pasta according to package directions; drain pasta, reserving 1/4 cup cooking liquid.
3. Process artichoke hearts and next 5 ingredients in a food processor or blender until smooth, stopping to scrape down sides as needed. Add 1/4 cup reserved cooking liquid. Pulse 3 to 4 times or until smooth. Toss with hot cooked pasta; season with salt to taste. Top each serving with pecan mixture.