Put the chicken in a bowl and sprinkle with paprika, garlic powder, salt, onion powder, oregano, red pepper and black pepper. Toss the chicken and the spices with your hands until the chicken is evenly coated with the spices. Set the bowl with chicken aside on the counter while you prepare onion and peppers.
Peel the onion and cut into slices.
Cut the bell peppers in half, cut off and discard the stems, scoop out the seeds with a spoon and discard. Cut the peppers into slices.
Heat 1/2 tbsp of oil in a large non-stick frying pan over medium-high heat.
Add the bell pepper and onion slices, and cook, stirring periodically, for 4 minutes.
Add the chicken pieces and the remaining 1/2 tbsp of oil to the frying pan, and mix until the chicken is combined with the onion and pepper slices.
Cook, stirring periodically, for 5 minutes, or until the chicken is cooked through (no longer pink in center).
Notes
If you want it less spicy, cut the amount of red and black pepper in half.