Cook the chicken: Heat the olive oil in a large skillet or Dutch oven. Add the chicken to the Dutch oven and season with salt and pepper. Cook for about 5 minutes or until the chicken is no longer pink.
Finish the dish: Add the onion, garlic, curry powder and stir. Cook for 2 more minutes then add the chicken broth, coconut milk, tomatoes, tomato paste and sugar. Stir everything together, bring to a boil then cover with a lid. Turn the heat down and simmer for another 15 to 20 minutes.
Garnish and serve: Garnish with parsley and serve over rice.