Arrange vegetables on platter; cover and chill. Blend cheese, sour cream, 1/4 cup pesto, lemon juice, and lemon peel in processor until smooth. Season with salt and pepper. Transfer to serving bowl. DO AHEAD: Can be made 1 day ahead. Cover and refrigerate.
Top dip with dollops of remaining 2 tablespoons pesto. Sprinkle dip with toasted pine nuts. Serve dip alongside platter of assorted vegetables.