01 - Season both sides of each chicken breast with kosher salt and black pepper, ensuring even coverage.
02 - Heat olive oil in a skillet over medium heat. Sear chicken breasts for 2-3 minutes per side until lightly golden for enhanced flavor development.
03 - Transfer seared chicken breasts to the slow cooker insert, arranging in a single layer.
04 - In a mixing bowl, whisk together minced garlic, dried oregano, dried thyme, crushed red pepper flakes, sliced sun-dried tomatoes, chicken broth, and heavy cream until fully incorporated.
05 - Pour the creamy sauce mixture evenly over the chicken. Sprinkle grated Parmesan cheese across the top.
06 - Cover and cook on low setting for 3-4 hours until chicken reaches internal temperature of 165°F and is tender throughout.
07 - Remove chicken from the slow cooker. Stir the sauce to emulsify, then return the chicken and coat thoroughly with the sauce.
08 - Plate the chicken with sauce. Garnish generously with fresh basil slices and additional freshly ground black pepper.