At almost every party you're sure to find a spinach dipeither cold inside a hollowed-out bread or hot and gooey in a bowl alongside some pita chips. But no matter how it is presented, it is usually full of fat. It doesn't have to be, though, so don't eliminate it from your party menu just yet. In this cold spinach dip recipe, by replacing the mayonnaise and cheeses with fat-free versions of yogurt and cream cheese, you will have a delicious dip without all of the fat. And no one will be the wiser. You can use frozen chopped spinach if you prefer. Before adding frozen spinach to the recipe, place it in a colander and pour boiling water over it until softened. Remove the excess water by pushing against the spinach with the back of a wooden spoon or wrapping in a towel and squeezing until dry. For an added boost of protein and less sugar and carbohydrates, substitute plain fat-free greek yogurt for the regular yogurt. Just be sure to choose fat-free since greek yogurt has a higher fat content than regular yogurt. Serve this low-fat spinach dip with a platter of fresh vegetables, some baked potato chips, or breadsticks. Feel free to spice it up a little by adding a dash of hot sauce.