Preheat the oven to 200°C (400°F) (180°C/350°F fan-forced).
In a large bowl, combine the olive oil, oregano, garlic, lemon zest and juice, sweet paprika, dijon mustard, sugar, salt and pepper. Add the chicken and toss to coat. Marinate for up to 24 hours or cook immediately.
Add the potatoes to a large baking pan and top with the chicken. Scrape out any marinade left in the bowl and coat the potatoes with it.
Arrange the potatoes in an even layer with the chicken sitting on top. Ensure the chicken cutlets are not overlapping.
Add the chicken stock to the base of the pan. If using, scatter the lemon slices around the pan on top of the potatoes only.
Bake for 55–60 minutes or until the chicken is golden and cooked through, shuffling the potatoes around at the 30-minute mark.
Sprinkle the chicken with fresh oregano or parsley and serve with your side of choice.
