for 1 drink:

3 ounces Prosecco (or any sparkling wine)
1 ounce Aperol
splash of soda water, sparkling water, or club soda
garnish of orange

Pour the sparkling wine into a glass of ice cubes.  Add the Aperol and then a splash of sparkling water.  Float a nice thick slice of orange on top - it will infuse the drink with orangey goodness even more as you sip.