Add orange juice, lime juice, lemon juice, and simple syrup to the shaker.
Shake the mixture for 10-15 seconds until well chilled.
Fill a tall glass with fresh ice cubes.
Strain the mixture into the glass through a fine mesh strainer.
Top with soda water and stir gently.
Garnish with an orange slice and mint leaves.
Notes
Store fresh-squeezed citrus juices in an airtight container for up to 24 hours.Make simple syrup by mixing equal parts sugar and hot water until dissolved. Let cool before using.For a sweeter drink, add an extra 1/2 oz of simple syrup.Replace soda water with ginger ale or sprite for extra sweetness.Keep citrus fruits at room temperature before juicing to get more juice.