Gather all of your ingredients, equipment you'll need for this recipe, and preheat your oven to 425℉.
After scrubbing your potatoes, peel the sweet potatoes but keep the skin on the red potatoes. Cut both into bite-sized pieces. Chop the onion into similarly-sized chunks.
Zest and juice one large lemon and cutting the other lemon in half lengthwise, slice into half-wheels.
In a mixing bowl, drizzle the chicken with olive oil, and then season with salt, pepper, minced garlic and oregano, massaging the skin well.
Into the 13x9 baking dish, add the chicken stock (or broth), freshly squeezed lemon juice, and season with additional salt, pepper and oregano (to taste). Add a few sprigs of fresh thyme, rosemary and parsley.
Over the braising liquid, add vegetables and stir well to coat. Season again lightly with salt and pepper.
Lastly, nestle your chicken into the dish, along with sliced lemons and additional sprigs of fresh herbs.
Place the baking dish into the preheated oven, uncovered, for about an hour, until chicken is golden brown, and the potatoes are fork tender. Serve chicken and potatoes with the lemony braising liquid and enjoy!