Sugared Cranberries:
Line a baking sheet with parchment paper.
In a small saucepan over medium heat, simmer water and sugar for 5 minutes, or until dissolved. Turn off heat.
Add cranberries to pan, and soak for 15 minutes.
Transfer cranberries, with a slotted spoon, to prepared baking sheet. Cranberries will dry with a light, crystal glaze on them. Store covered, at room temperature, for 3 days.
Cocktail:
Fill an old fashioned glass with ice. Pour vodka into glass, then Prosecco.
Garnish with lime slices and sugared cranberries.