Preheat oven to 375°F
Make sure to prepare the potatoes and chicken
In a large bowl, combine potatoes and chicken. Toss the chicken and potatoes in a large bowl with 1 tablespoon of olive oil. Season generously with salt, pepper, and the Italian seasoning mix (or Herbs de Provence).
Melt butter in a large skillet on medium heat. Add 1 tablespoon olive oil to the butter and stir it well.
Place the chicken in one half of your pan. Add the potatoes to the second half. Cook the chicken for 3-4 mins, then flip it and continue cooking until golden brown on both sides. Place the potatoes and chicken on a plate. Cover to keep warm.
Make the sauce
Melt butter in the same skillet over medium heat. Stir in garlic for 1 minute til fragrant.
Mix in chicken broth, dijon mustard, and then add heavy cream, salt, and pepper.
Combine it
To prevent them from drying out in an oven, return the chicken and potatoes to their pans.
Bake for 15-20 minutes in a preheated oven until the chicken is done and the potatoes are tender.
Serve the potatoes and chicken with dijon sauce. Garnish the dish with fresh herbs and cracked black pepper if you like.