Ginger Fizz cocktail

From epicurious.com  https://www.epicurious.com/recipes/food/views/ginger-fizz-51193820

Ginger Fizz - the syrup is great for cocktails.  We tried it in limoncello also and that was a great combo.  DO NOT discard the ginger if you're a ginger lover!  It is sweetened from the syrup and softened, and if you've sliced it thinly enough, you can eat it straight up or put it on ANYTHING you're eating.

INGREDIENTS:

Ginger Syrup:
3" piece ginger peeled, thinly sliced
1/2 cup raw or granulated sugar
1/2 cup water

Cocktails:
2 750-milliliter bottles chilled Prosecco
8 thin clementine or orange slices


PREPARATION:

1)  For ginger syrup: Bring one 3" piece ginger, peeled, thinly sliced, 1/2 cup raw or granulated sugar, and 1/2 cup water to a boil in a small saucepan; reduce heat and simmer 5 minutes. Let cool. Strain syrup through a fine-mesh sieve into a small jar or bowl.  Instructions said to discard ginger - NO WAY! In my house, we eat this softened, sweetened ginger.

DO AHEAD: Syrup can be made 1 week ahead. Cover and chill.

2) For cocktails:  Pour 1/4 ounces ginger syrup in each coupe glass. Dividing evenly, top off with two 750-milliliter bottles chilled Prosecco (about 5 ounces per glass) and garnish each with a thin clementine or orange slice.