5Mix olive oil, lemon juice, chopped garlic, Dijon mustard, oregano, salt, and pepper in a jar.
6Place the potatoes in a baking pan and season with salt and pepper.
7Add the chicken pieces on top of the potatoes.
8Drizzle the sauce over the chicken and potatoes. Add water to the jar, swirl to collect remaining sauce, and pour it along the side of the pan.
9Sprinkle the chicken with black pepper.
10Cover the pan with a lid and bake at 380 Fahrenheit (180 Celsius) for 1 hour and 20 minutes. Remove the lid, and bake for an additional 40-45 minutes, basting 3-4 times to keep it moist.