Preheat the oven to 200°C.
Peel the parsnips, cut them in half, lengthwise if too big. Put them in boiling, lightly salted water and cook for 4 minutes, drain, then place them in a baking tray. Add 2 Tbsps of and oil and sprinkle with nigella seeds and cumin. Arrange the chicken pieces between the parsnips.
Season the chicken pieces with salt & pepper, then with garam masala powder. Rub them with the remaining oil.
Put the tray in the oven and cook for about 45 minutes until golden, turning both the chicken and parsnip pieces at least once.
Serve with steamed rice and a salad.