Combine ingredients soup through salt and pepper in a large mixing bowl. Mix well.

Butter a large casserole dish. Transfer soup mixture. Top with onions and breadcrumbs. Sprinkle parmesean atop.

Spray a piece of foil with non-stick cooking spray. Cover. Bake at 375° for 30 minutes. Uncover. Cook an additional 15 minutes or until chicken is thoroughly reheated and casserole is bubbly with a crunchy crust.

Variations; Red bell pepper, white wine, champagne, white vinegar, white wine vinegar, red wine vinegar, white pepper, peppercorn melange, butter, brown butter, parsely, cilantro, scallions, chives, cayenne, crushed pepper flakes, habanero, bacon, pancetta, oregano, zucchini, fennel, celery, carrots, jalapeños, paprika, smoked paprika, applewood seasoning, dried ranch seasoning, dried sriracha, coriander seed, ginger, honey, lime, lemon, horseradish, sherry, balsamic, thyme, tomatoes, orange, green beans, red fresno chiles, goat cheese, romano, gruyere, parmigiano reggiano, pecorino, spinach, arugula, asiago, feta, gouda, coconut, heavy cream, curry, red onion, dijon, sage, tarragon, rice vinegar