Remove the dish from the oven and let the chicken rest for 5 minutes. The sauce will continue to thicken slightly as it cools. Taste the sauce and adjust seasoning with a bit more salt or pepper if needed.
Garnish with chopped fresh parsley and serve the chicken with plenty of the creamy lemon sauce spooned over the top and over your chosen sides.
To make this even more weeknight-friendly, you can prep the sauce and season the chicken the night before, then just sear and bake when you get home. If you prefer dark meat, swap the breasts for boneless, skinless chicken thighs and add 5–10 minutes to the baking time, checking for doneness. For extra veggies built right into the dish, tuck a handful of fresh spinach or a layer of sliced zucchini or mushrooms around the chicken before pouring the sauce over. If you like a cheesier, more casserole-style bake, sprinkle an additional 1/2 cup of shredded mozzarella or provolone on top during the last 5–10 minutes of baking. For a brighter, more tangy flavor, increase the lemon juice by 1 tablespoon; for a milder lemon note, reduce the zest slightly. You can also lighten the sauce a bit by using half heavy cream and half unsweetened almond milk, though the sauce will be slightly thinner. Leftovers reheat well in a covered skillet over low heat—add a splash of cream or broth to loosen the sauce and keep the chicken from drying out.