Wash the chicken thoroughly and pat dry. Rub with salt and pepper. Place the chicken on the fat pan of the oven. Bake in the preheated oven (electric cooker: 200 °C/ gas: level 3) for about 1 hour.
In the meantime, peel, wash and quarter the potatoes. After approx. 20 minutes frying time add to the chicken and cook. Season with salt and pepper. Clean, peel and slice carrots diagonally.
Peel the shallots. Clean, wash and chop the spring onions. Pluck rosemary needles from the stalks and chop roughly. Mix lemon juice, zest, oil and rosemary. Spread the chicken with it during the last 10 minutes of cooking time.
Heat the fat in a saucepan. Sauté carrots and shallots in it. Add stock and cook covered for about 5 minutes. Add spring onions and cook for another 4 minutes. Season to taste with salt and pepper.
Arrange chicken, vegetables and potatoes on a plate. Garnish with parsley.