01 - In a small saucepan, combine sugar and water. Heat over medium heat, stirring until sugar dissolves completely, approximately 2 to 3 minutes. Remove from heat and allow to cool to room temperature.
02 - In a mixing bowl, stir together cooled simple syrup, freshly squeezed lemon juice, lemon zest, and a pinch of sea salt if using, ensuring thorough integration.
03 - Pour mixture into a shallow freezer-safe dish. Freeze for 1 hour, then scrape and stir the semi-frozen sorbet with a fork to break up ice crystals. Return to freezer.
04 - Continue freezing and scraping every 30 to 45 minutes until the sorbet is fully frozen and has a light, fluffy texture, about 3 to 4 hours in total.
05 - If available, churn mixture in an ice cream maker in accordance with the manufacturer's instructions until properly frozen and airy.
06 - Scoop sorbet into serving bowls or glasses. Garnish with fresh mint leaves if desired. Serve immediately.