Combine pattie ingredients, except cheese, in a large bowl.
Mix well with your hands to incorporate everything.
Divide mixture into 8 equal balls.
Form each ball into a pattie and press an indention into each.
Fill each with cheese.
Take 2 patties and stack together with cheese inside.
Press edges together to seal cheese inside.
Heat 1 tablespoon of olive oil in a large skillet over medium low heat.
Cook until browned on both sides (about 3 minutes per side).
Combine sauce ingredients in food processor or blender and run until blended.
Add sauce to skillet cover and simmer for 15 minutes.