01 - Preheat the oven to 425°F. Line a rimmed baking sheet with parchment paper or lightly grease the surface with nonstick spray.
02 - Pat the chicken breasts thoroughly dry on both sides using paper towels. For even cooking, pound any thicker portions to a uniform thickness.
03 - In a small mixing bowl, combine the olive oil, salt, black pepper, garlic powder, paprika, dried thyme, and onion powder until a uniform paste forms.
04 - Rub the seasoning mixture evenly over both sides of each chicken breast, ensuring full, even coverage across the surface.
05 - Place the seasoned chicken breasts on the prepared baking sheet, leaving at least 1 inch of space between each piece to allow proper air circulation.
06 - Bake on the center rack for 20 to 25 minutes, or until an instant-read thermometer inserted into the thickest part registers 165°F and the juices run clear.
07 - Remove from the oven and let the chicken rest for 5 minutes on the baking sheet. This allows the juices to redistribute throughout the meat for maximum tenderness.
08 - Slice and arrange on a serving platter. Garnish with freshly chopped parsley and serve alongside lemon wedges, if desired.