Place sliced strawberries in medium bowl. Cover with sugar and stir to coat all slices. Let sit for 15 minutes to create a strawberry syrup.
While strawberries macerate, in a tea kettle or small sauce pan, bring 6 C of water with tea bags to a low boil. Remove from heat and let steep for 5-7 minutes. Discard tea bags and let tea cool.
When strawberries have macerated for 15 minutes, strain off syrup using a mesh strainer. Put rest of strawberries into a food processor. Pulse until liquid. Strain off liquid again using mesh strainer. Stirring the pureed berries against the mesh with a wooden spoon works out all the liquid. Should render about 2 ½ C syrup total. Discard pulp.
Combine tea and syrup in a 64 oz pitcher, stirring well. Add additional sweetener to taste (about ¼ C). Finishing filling pitcher with cool water or ice. Garnish with extra strawberries and mint, if desired.
Notes
Strawberry pulp can be saved and used as a delicious ice cream topping!