Low calorie,delicious sauce.

2tbsp butter
220gr fat-free cream cheese
2 garlic cloves
1/4tsp black pepper
2cups fat-free yogurt
150gr. fat-free mozzarela cheese
2tbsp grated parmesan cheese
salt to taste

Melt the butter in a pot.Add the cream cheese to it and stir to combine.
Add the crushed garlic and black pepper.
Constantly,add the yogurt,while stirring.
Add the mozzarela and stir to melt and combine.After this,add the parmesan and wait to melt.Stir.
Add a pinch of salt for taste and remove from the heat.
That's it.