Grind the ginger, chop the garlic, chop the onion in small piece and chop the turnip in cubes.

Fried them in a pan with olive oil for three minutes.

Add the curry paste and leave it cook for another 2 minutes.

Chop the chicken in small cubes and add it in the pan. Let it cook for 3 minutes.

Finally add the tomato and the coconut milk. 
Let it cook until it boil then turn down the fire and leave it cook for 20 minutes.

Serve with rice.