1. Place butter and onion in a deep, 2.5-quart, heat-resistant, non-metallic casserole. Heat, uncovered, in Microwave Oven 3 minutes or until onion is tender. Stir mixture occasionally.
2. Add peas, salt, sugar and water. Heat, uncovered, in Microwave Oven 3 minutes. Puree mixture in a blender until smooth.
3. Add light cream and heat, uncovered, in Microwave Oven 3 to 5 minutes or until heated through. Stir occasionally.
4. Stir in remaining ingredients and heat, uncovered, in Microwave Oven 1 minute longer or until soup bubbles.
5. Allow soup to stand 2 to 3 minutes before serving.