Cook pierogi first. Boil in water for a few minutes. Place in lightly sprayed casserole dish.
Preheat oven to 375 degrees.
Place sliced kielbasa sausage into casserole dish with pierogi.
In a medium bowl add cream cheese, shredded cheese, black pepper, chicken broth, and sour cream. Mix well.
Pour over sausage and pierogi. Mix well.
Cover casserole dish with tin foil. Bake for 22-25 minutes. Remove tin foil. Sprinkle extra cheese on it. Place oven on broil and cook for 5 minutes.
Sprinkle with green onions or chives. Enjoy.