Yarrow Simple Syrup:
Small handful fresh yarrow
1 cup water
1 cup sugar
Directions: Bring the water to a boil and pour over the yarrow leaves. Let steep for 10 minutes, then strain, reserving the infused water.
Add the water to a small saucepan with the syrup and heat until the sugar dissolves. Pour into a sterilized jar and cool to room temperature, then refrigerate.
To make the cocktail: Add ½ ounce yarrow simple syrup and 2 ounces peach or apricot nectar and mix. Top with sparkling water, garnish with an edible flower, and serve.