How to Make It
In a small bowl, combine the chile powder, cayenne, cumin and oregano with 1 tablespoon of salt and 1 teaspoon of black pepper. Rub the steaks with the spice mixture and arrange on a platter. Let them come to room temperature.
Light a grill or preheat a grill pan and oil it lightly. Brush the onions with the oil and season with salt and black pepper. Grill over a hot fire until nicely charred, about 8 minutes.
Grill the steaks over the hot fire for 4 to 5 minutes per side for medium rare. Transfer the steaks to plates and top with the onions. Serve Yuca Fries on the side.