Place half the artichokes in a food processor; add cream cheese, 1/4 cup Parmesan, lemon juice, garlic, cayenne, and 3 tablespoons water. Process until smooth.
Add scallions, remaining artichokes, and spinach; pulse briefly. Transfer mixture to a serving bowl. (To store, refrigerate, up to 2 days.) Top with 1 tablespoon Parmesan, and serve dip with raw vegetables.
Sorry, Mary, but unless you folks thrive on bland, this dip gets 2 thumbs down. Where is the flavor? I'm an award winning cook and I threw this out, despite hoping that it would live up to its description. Yech! Those poor artichoke hearts gave it up for nothing.
I love spinach artichoke dip but my old recipe was very high in fat. This light version was delicious and very easy. I did use fresh spinach that I steamed first and served with pita chips instead of veggies.