Soak the skewers for at least 20 minutes totally submerged in water before using it to prevent burns. You may skip this part if pan grilling.
In a medium bowl, mix garlic powder, onion power, smoked paprika, white pepper, cayenne pepper, and bouillon powder. Place it on a plate, Set aside.
Grind roast groundnuts in a coffee grinder with skin on, until finely crushed. Add the ground peanuts into spice mixture. Or skip this part and just use peanut butter.
Pat the steaks dry with a paper towel. You want to have a completely dry steak before cooking. Slice the steak into a diagonal medium thin shape,
Thread the steaks onto the skewers about 4 per skewer. Making sure the skewer is fully covered with slices of meat
Rub the steak skewer with spice mixture; on both sides.
Place a grill pan over medium heat, and then brush it with oil to prevent the meat from sticking. Grill the curry beef stays for 3 to 5 minutes on each side, until nicely seared and cooked through
Serve warm with this African Pepper Sauce.