In a small saucepan, combine 1 cup of fresh blueberries, 2 tablespoons of honey, and 1 cup of water. Heat over medium heat for about 5 minutes, stirring gently until the blueberries burst and release their juices. Strain the mixture through a fine mesh sieve into a bowl to extract the blueberry juice, setting it aside to cool.

In a separate pot, bring 3 cups of water to a boil, then remove from heat. Place 2 green tea bags in the water and steep for 5 minutes. After steeping, carefully remove the tea bags and let the brewed tea cool slightly.

In a large pitcher, pour in the cooled blueberry juice along with the brewed green tea. Add 1 tablespoon of freshly squeezed lemon juice. Stir well to combine all the flavors and adjust sweetness as desired.

Transfer the pitcher to the refrigerator and let it chill for at least 1 hour.

Fill glasses generously with ice cubes. Pour the chilled blueberry green tea over the ice and garnish with fresh mint leaves and blueberries if desired.