Preheat the oven to 350.
Lightly spray an 8x8 baking dish with nonstick cooking spray. Arrange chicken in a single layer. Top each chicken breast with a slice of Swiss Cheese.
In a small to medium mixing bowl, combine the soup, wine and garlic powder. Stir until smooth. Pour/spread sauce evenly over the chicken and cheese.
Sprinkle the stuffing mix evenly over the casserole. Drizzle melted butter over the top.
Bake until the stuffing mix is golden brown and the internal temp of the chicken is 165; about 45 minutes.