Cook the rice according to package directions.

Heat the oil in a skillet over medium-low heat. Add the onion, stirring occasionally, for 7 minutes

Sprinkle with the curry powder and cook, stirring, for 1 minute

Add the yogurt and cream and simmer gently for 3 minutes. Stir in the salt, pepper, and tomatoes. Remove from heat.

Divide the rice and chicken among individual bowls, spoon the sauce over the top, and sprinkle with cilantro if desired.