Wash the tomatoes. Cut off a 3" or so piece from the rounded side of the tomato which would be the opposite side of where the stem used to be. Don't discard them & keep the cut piece along side of the tomato it was cut from to be used as a cap to hold in the filling. (If you would like you can go through the process of removing the skin from tomatoes.)
With a spoon scoop out the insides of tomatoes placing it all in a blender.
Set the tomato shells & caps aside.
Brown the ground beef or turkey, breaking it up and adding the minced green pepper, onion, pepper, seasoning salt & garlic powder to taste.
Place the meat mixture in a bowl and allow to to cool.
To the meat mixture add the 3 cups of cheese & combine.
Use this mixture to stuff the tomatoes. Place the caps on the tomatoes pressing it into the tomato so it will stay in place.
Set the stuffed tomatoes in a large pot trying to keep them all in one layer on the bottom of the pot.
To the blender, along with the tomato pulp, add the pieces of onion, green pepper, chicken boullion, salt, pepper & garlic powder to taste. Blend it well. If it is too thick you can add 1/2-1 cup of water.
Pour this mixture over the tomatoes in the pot.
Bring to a boil, then simmer, covered until the tomatoes are tender.