Preheat oven to 350F. Using an oven-proof skillet over medium heat, melt 1 tablespoon of butter. Season chicken with salt and pepper, to taste and add it to the skillet, cook until chicken is cooked thru stirring few times, about 5-10 minutes, transfer to a plate.
To the same skillet add 2 cups of ham, cook until browned 4-5 minutes, stirring few times. Transfer ham to a plate with chicken.
Sauce
Into the same skillet add onion and 5 tablespoons of butter, and saute until onion is tender about 5 minutes, stirring few times.
After, stir in ⅓ cup of flour, ⅛ teaspoon of ground mustard, ⅛ teaspoon cayenne pepper and ⅛ teaspoon of nutmeg (optional), mix until everything is combined. Slowly pour in 2 cups of milk, whisking continuously. Bring it to a gently boil, season with salt and pepper, to taste. Cook until sauce thickens, about 2 minutes, stirring few times.
Return ham and chicken back into the skillet with the sauce, add 1 cup of Swiss cheese and stir to combine. In a bowl combine all of the topping ingredients, then sprinkle over the top of the chicken. Bake uncovered for 25-30 minutes or until bubbly and golden color on top. Garnish with chopped parsley. Serve with pasta or salad. Enjoy!
Notes
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