1Place 8- or 9-inch square glass baking dish in freezer to chill. Meanwhile, in 1-quart saucepan, heat 1 cup of the soymilk and the sugar just to boiling over medium-high heat, stirring frequently. Add tea bags and push into soymilk mixture; let stand 5 minutes. Discard tea bags.
2Stir in remaining 2 cups soymilk, the orange peel and lemon peel until well blended. Pour into chilled dish; freeze 30 minutes. When ice crystals begin to form at edges of dish, stir mixture with fork. Freeze about 3 hours longer, stirring every 30 minutes, until completely frozen.
3To serve, scoop into individual dessert bowls. Garnish with mint leaves.