Pierogi Chicken Supper is a hearty and comforting one-pot meal that combines the flavors of pierogies and chicken into a delicious casserole. This dish features tender chicken breasts, saut茅ed onions, and cooked pierogies, all baked together in a creamy sauce. It's a satisfying and flavorful dinner that is perfect for busy weeknights. Serve it with a side of steamed vegetables or a fresh salad for a complete meal.