Bring 3 cups of water to a boil. Add tea bags and brew according to package directions, 3 to 4 minutes. Discard tea bags

While tea is brewing, combine 1/2 cup water, sugar, ginger, and lemon juice in a small saucepan. Simmer just until the sugar is fully dissolved. Pour syrup through a fine strainer

Combine tea and simple syrup

Add bourbon and top with ice

Serve with lemon slice to garnish