Pat the chicken breasts dry with paper towels and season both sides with salt, black pepper, and garlic powder.
Heat the olive oil in a large oven-safe skillet over medium-high heat.
Place the chicken in the skillet and sear for 6 to 8 minutes per side, or until the internal temperature reaches 165 degrees Fahrenheit.
While the chicken cooks, whisk together the honey, apple cider vinegar, and red pepper flakes in a small bowl.
Once the chicken is cooked, reduce the heat to low and pour the honey mixture over the chicken in the skillet.
Simmer the sauce for 2 minutes, spooning the glaze over the chicken repeatedly until it thickens.
Remove from heat and immediately top each chicken breast with crumbled feta cheese.
Garnish with fresh parsley and serve.