Preheat oven to 375
In a large oven-safe skillet heat oil over medium-high heat. Season chicken generously with salt and pepper and sear until golden, about 4-5 minutes per side. Transfer chicken to a plate
Return skillet to medium heat. Add garlic and cook for 1 minute. Stir in thyme, red pepper flakes, chicken broth and half and half. Cook for 5 minutes, stirring often. Stir in sundried tomatoes and parmesan cheese.
Return chicken to skillet and spoon sauce all over the chicken breasts. Bake until chicken is cooked through, about 15-18 minutes. Garnish with basil and grated parmesan cheese if desired.