01 - Combine sugar and water in a small saucepan. Heat over medium heat, stirring constantly until sugar completely dissolves, approximately 2–3 minutes.
02 - Remove saucepan from heat. Add fresh mint leaves to the hot syrup, gently pressing with a spoon to release essential oils. Cover and allow to steep for 10 minutes.
03 - Pour the infused syrup through a fine mesh strainer into a mixing bowl, pressing firmly to extract maximum mint flavor. Discard the spent mint leaves.
04 - Add lemon juice, cranberry juice, and lemon zest to the strained mint syrup. Whisk thoroughly until all components are fully incorporated.
05 - Transfer the mixture to a shallow, freezer-safe container. Cover tightly and place in freezer for 1 hour.
06 - After 1 hour, remove from freezer and scrape the entire surface with a fork to break up ice crystals. Return to freezer and repeat scraping process every 30–45 minutes for 3–4 hours until the sorbet reaches a light, fluffy consistency.
07 - Scoop into chilled bowls or dessert glasses. Garnish generously with fresh mint leaves and serve immediately.