Preheat oven to 375°F (190°C).
Season chicken with salt and pepper; place in a baking dish.
Spread Caesar dressing over the chicken and sprinkle with Parmesan.
Bake for 25–30 minutes until cooked through.
Meanwhile, heat cream, garlic, Dijon, and extra Parmesan in a pan; simmer until slightly thick.
Pour sauce over baked chicken and garnish if desired.
