1In 4- to 5-quart Dutch oven, melt butter over medium heat. Cook garlic in butter 1 minute. Add spinach; sprinkle with salt. Cook 1 to 2 minutes or just until spinach is wilted. Drain spinach; squeeze dry.
2In food processor, place spinach mixture, sour cream, cream cheese, feta cheese, dill and 1 teaspoon lemon peel. Cover; process with on-and-off pulses until smooth, scraping bowl once. Into serving bowl, spoon spinach mixture. Cover; refrigerate 2 hours to blend flavors. Top with pine nuts, green onions and additional lemon peel. Serve with pita chips.