Step 1: Cut lemon in half & juice lemon into the shaker.
Step 2: Break up mint sprig and add to shaker.
Step 3: Add 1/2 cup blueberries.
Step 4: Add 1 oz simple syrup.
Step 5: Muddle ingredients in shaker.
Step 6: Add 2oz WhistlePig PiggyBack Rye Whiskey.
Step 7: Add half a tin of crushed ice.
Step 8: Shake vigorously.
Step 9: Add ice to glass & strain drink over ice.
Step 10: Garnish with mint.