Combine rice and 2/3 cup french fried onions in large bowl.
Spoon half the rice mixture into microwaveable 2 quart casserole dish.
Spread sour cream over rice mixture.
Layer half of the salsa and half of the cheese over sour cream.
Sprinkle with remaining rice mixture; salsa and cheese.
Cover loosely with plastic wrap.
Microwave on high for 8 minutes or until heated through.
Sprinkle with remaining 2/3 cup onions.
Microwave 1 minute or until onions are golden.