Slice onions and mushrooms. Place chicken, onions, and mushrooms in a 9x13 baking dish.
Combine Italian dressing, chicken broth, olive oil, lemon juice, Worcestershire sauce, garlic, salt, black pepper, and cayenne pepper in a bowl and stir to combine. Pour over chicken,
Bake for 35-40 minutes, until chicken is fully cooked. Enjoy :)