In a blender or ninja, blend together all of the ingredients for the green goddess dressing until smooth. Set aside.
Preheat the grill to high. Rub steak with oil. Sprinkle with chili powder, salt, and pepper.
Place the steak on the grill and cook until golden brown and slightly charred, about 4 to 5 minutes. Turn the steaks over and continue to grill for 3 to 5 minutes for medium-rare (an internal temperature of 135 degrees F); 5 to 7 minutes for medium (140 degrees F); and 8 to 10 minutes for medium-well (150 degrees F).
Allow steak to rest for 10 minutes before slicing across the grain.
For the salad bowls, divide the lettuce, corn, avocado, green onion and feta among 4 bowls. Equally divide the steak among the bowls. Drizzle with desired amount of dressing, garnish with jalapeno peppers, and serve.