Preheat oven to 500ºF
In a large bowl (or stand mixer) sprinkle yeast over warm water and mix until dissolved.
Add sugar, salt, oil, and flour and mix well.
Dump the mixture onto a floured surface and knead for 3-5 minutes, until a soft dough forms.
Punch dough down and divide into 8-10 pieces.
Roll each piece into a ball and flatten with a rolling pin to form a small circle.
In a medium bowl, mix salsa, chicken and cheese.
Place a large spoonful onto each dough circle.
Fold dough over and seal tightly.
Bake on a greased cookie sheet in preheated oven for 10-15 minutes, or until browned.