1Heat oven to 400°F. Spray 12-inch pizza pan with cooking spray. In medium bowl, stir Crust ingredients until soft dough forms. Press dough in bottom of pizza pan, forming a crust at edge of pan. With fork, prick to prevent crust from puffing.
2Bake 12 to 16 minutes or until crust is golden. Cool 10 minutes. Meanwhile, in medium bowl, beat Greek Vinaigrette Dressing ingredients with whisk until well blended. Set aside.
3In medium bowl, mix cream cheese and sun-dried tomatoes. Spread mixture on pizza crust. Top with tomato, cucumber, onion, olives and spinach. In small bowl, mix together 1/4 cup of the dressing and the feta cheese; spoon over pizza. (Cover and refrigerate remaining dressing for another use.)