Place tea bags in a large heat-proof container. Add boiling water, cover and set aside to steep for 5 minutes. Remove tea bags and discard. Add sugar and stir until it dissolves.
Pour tea mixture into a large saucepan. Add ginger. Heat over medium-high heat. Carefully add pears, cut side down and bring to a simmer. Reduce heat to medium-low. Simmer for 18-20 minutes or until pears are tender. Remove ginger. Set aside to cool.
Transfer pears to a serving bowl using a slotted spoon. Pour syrup over pears. Serve with vanilla ice cream and sprinkle with walnuts.
WARNING: Consuming this product can expose you to chemicals including lead, which are known to the State of California to cause cancer and birth defects or other reproductive harm. For more information go to: www.P65Warnings.ca.gov/food