In a large pot, melt the butter or beef tallow. Add the chopped green onions and red bell pepper, season with salt to help them soften, then add the ground beef. As it cooks, season with crushed red pepper, paprika, sugar (for a touch of sweetness), salt, and pepper to taste.

Once the beef just changes color, turn off the heat. Add the flour and chopped parsley, and stir well to combine all the flavors.

Transfer the filling to a large bowl and let it cool completely in the refrigerator. For best flavor, make the filling a day ahead.

When the filling is cold, add the chopped hard-boiled eggs, raisins, and chopped pitted olives.