Follow these simple steps to create your Grilled Chicken Stuffed with Cheese and Peppers:

1. Prepare the Chicken: Preheat your grill to medium-high heat. Butterfly each chicken breast by slicing it horizontally, but not all the way through, to create a pocket.
2. Season the Chicken: In a small bowl, mix together garlic powder, onion powder, paprika, salt, and black pepper. Rub this spice mixture onto the chicken breasts, both inside and out.
3. Sauté the Peppers: In a skillet, heat olive oil over medium heat. Add the diced bell peppers and sauté for about 5 minutes until they are tender. Remove from heat and let cool slightly.
4. Stuff the Chicken: Spoon the sautéed peppers into each chicken pocket, followed by the shredded cheese. Make sure not to overstuff, as the cheese will melt and can spill out.
5. Secure the Filling: Use toothpicks to secure the openings of the chicken breasts, ensuring the filling stays inside while grilling.
6. Grill the Chicken: Place the stuffed chicken breasts on the preheated grill. Cook for about 6-8 minutes on each side, or until the chicken is cooked through and the internal temperature reaches 165°F (75°C).
7. Rest the Chicken: Once cooked, remove the chicken from the grill and let it rest for a few minutes. This helps the juices redistribute and keeps the chicken moist.
8. Remove Toothpicks: Carefully take out the toothpicks before serving.
9. Garnish: Sprinkle fresh parsley over the top for an added touch of color and flavor.

These steps will lead you to a deliciously grilled chicken dish that is both satisfying and full of flavor.