Cranberry St. Germain Cocktail

Bahan-bahan (1 porsi)

• 1 lime (zest and 1/2 ounce juice)
• 1 tablespoon sugar (for rimming glass)
• Ice cubes
• 2 ounces vodka
• 1 ounce elderflower liqueur (such as St. Germain)
• 1 ounce cranberry juice
• Frozen cranberries (for serving)