Peel the onions, dice them finely and sauté them in the butter until translucent, stir in the rice, pour the vegetable stock over them, bring to the boil and leave to swell in a closed saucepan with low heat for approx. 20 minutes.
Clean the soup vegetables, cut them into small pieces and put them in the soaked Römertopf.
Rub the chicken vigorously with salt, pepper, paprika and chili powder.
Put the rice in the chicken, place the chicken on the vegetables, pour the chicken stock, close the Roman pot and put it in the cold oven,
Set the oven to 200 ° C and cook the chicken for about 2 hours, then remove the lid and let the chicken brown for another 15 minutes.