01 - Season the chicken breasts on both sides with salt and pepper, ensuring even coverage for balanced flavor throughout the dish.
02 - Heat olive oil in a skillet over medium heat. Sear chicken breasts for 2–3 minutes per side until lightly golden to develop rich flavor and attractive color.
03 - Place the seared chicken breasts in the slow cooker, arranging them in a single layer for even cooking.
04 - In a bowl, whisk together garlic, oregano, thyme, crushed red pepper flakes, sun-dried tomatoes, chicken broth, and heavy cream until fully combined.
05 - Pour the sauce mixture evenly over the chicken. Sprinkle Parmesan cheese across the top, distributing it uniformly.
06 - Cover and cook on low for 3–4 hours, or until the chicken reaches an internal temperature of 165°F and is tender throughout.
07 - Remove chicken from the slow cooker temporarily. Stir the sauce to blend any separated ingredients, then return the chicken and coat thoroughly.
08 - Garnish with fresh basil slices and additional freshly ground black pepper just before serving for maximum freshness and visual appeal.