Place a small skillet in the oven and preheat to 375°F.
Sprinkle one side of the chicken thighs with 1/8 teaspoon chili powder. Add the chicken thighs to the hot pan seasoned side down.
Sprinkle another 1/8 teaspoon of the chili powder on top of the chicken and return the pan to the oven.
Roast for about 8 minutes and turn. Roast for another 7 to 10 minutes and remove the chicken to a plate. Chill.
Place the water in a medium sauce pan over high heat. When the water boils, add the eggs and cook for three minutes.
Remove from the heat and let the eggs stand in the hot water for 12 minutes. Run under cold water and peel. Place in the refrigerator to chill.
Place the oil in a large skillet over medium high heat.
Add the onion and cook for about 3 minutes. Stir frequently.
Add the corn and cook, stirring frequently, for about 7 minutes.
Remove to a bowl and chlll.
Place 1/4 cup of the black beans, buttermilk, cumin, 1/4 teaspoon chili powder, oregano, salt and pepper in a blender or mini chopper and blend until smooth.
Chill.
When ready to serve, place the torn lettuce in the center of a plate. Slice the chicken into strips and place to one side of the plates. Divide the corn between the two plates on the other side of the plate.
Slice the tomatoes in half and place to one of the open sides of each plate.
Slice the eggs in quarters and place one sliced egg in the other quarter of each plate.
Top the lettuce with the remaining 1/2 cup beans divided between the two plates.
Top the salad with dressing and serve.