Heat up 2 tablespoons of oil in a large frying pan.
Season the chicken with salt, pepper and paprika, and sear on both sides until golden - work in batches to avoid overcrowding the pan.
Remove the chicken from the pan and set aside.
Peel and chop the onion and garlic, add the remaining oil to the pan, and fry the onion until golden.
Cut the mushrooms into quarters, and add them to the pan together with the chopped garlic.
Rinse the rice with cold water until the water runs clear, then add it to the mushrooms - mix everything well.
Preheat the oven to 220 degrees Celsius (430 Fahrenheit).
Transfer the rice mixture to an oven-proof dish in one layer, top with the seared chicken drumsticks, and pour over the chicken stock.
Cover the dish with kitchen foil, and bake for 40 minutes until the rice is fluffy and the chicken is cooked through, then remove the foil and bake for a further 10 minutes for chicken to turn nicely golden.
Garnish with chopped parsley and serve immediately!