Season the chicken breasts with salt and pepper, then add them to the pan.
Cook until golden and cooked through, about 6-7 minutes per side.
In a bowl, mix together cream cheese, sour cream, minced garlic, and grated Parmesan.
Pour the mixture over the cooked chicken in the pan.
Reduce heat and let the sauce simmer for a few minutes until heated through.
Serve with your choice of low-carb sides.
Notes
Don't overcook the chicken, and adjust the sauce consistency with a splash of chicken broth or water if it's too thick. Refrigerate leftovers for up to 3-4 days, or freeze for 2-3 months.