One Pan Creamy Dijon Mustard Mushroom Chicken

Bahan-bahan (4 porsi)

• 2 boneless skinless chicken breasts (cut in half lengthwise)
• salt and freshly ground pepper
• 1 tbsp olive oil
• 2 tbsp butter
• 8 ounces mushrooms of choice (sliced)
• 4 cloves garlic (sliced)
• 1/2 cup chicken stock (unsalted)
• 1/2 cup heavy cream
• 1 tbsp dijon mustard
• 2 -3 large handfuls leafy greens/spinach (if desired)