I am not sure what the country of orgin devils spit comes from but I would not rule out Turkish or Balkan like you said. I am still waiting for a email response from the owners. Have you heard of a town called Ketch. That is where I lived off post. I have not been back to Germany sinse 1982, so I am sure many changes have occured from that time. Here is a recipe for Schwenkbraten for you to enjoy
10 onions, cut into wedges
1 cup vegetable oil
4 cloves garlic, crushed
7 dried juniper berries, crushed
1 tablespoon German stone ground mustard
1 tablespoon dried thyme
1 tablespoon dried oregano
1 tablespoon paprika
1 tablespoon curry powder
1 tablespoon cayenne pepper
1 tablespoon ground black pepper
8 (8 ounce) boneless pork loin chops
Place the onion wedges in a bowl. Use a large spoon to gently press the onions until they release some of their juices.
Combine the oil, garlic, juniper berries, mustard, thyme, oregano, paprika, curry powder, cayenne pepper, and black pepper with the onions and mix to combine.
Arrange the steaks in a large baking pan.
Pour the marinade evenly over top of the pork. Cover and refrigerate for at least 24 hours.
Remove pork from marinade and allow to come to room temperature as you preheat the grill.
Wrap the onions separately with foil to create a pouch. Discard marinade.
Preheat grill for medium heat.
Grill the pork steaks and onions until the pork is no longer pink in the center, about 10 minutes per side.