In a large mixing bowl, combine the lemon slices, sugar, fresh mint leaves, fresh rosemary leaves, and vanilla seeds (and pod, if using). Gently massage the mixture with your hands for about 2–3 minutes, until the lemons release their juice and the herbs become coated in sugar, creating a fragrant blend that excites the senses.

Cover the bowl tightly with plastic wrap and place it in the refrigerator for a minimum of 3–4 hours, or overnight if time allows. This infusion period allows the flavors of the mint, rosemary, and vanilla to meld beautifully with the lemon, enhancing the overall taste of your Mint and Rosemary Lemonade with Vanilla.

Once the infusion time is complete, retrieve the bowl from the refrigerator. Set a fine-mesh strainer over a large pitcher, and pour the infused mixture through it. Use your hands to press down on the lemon slices to extract as much juice as possible. Discard the solids left in the strainer, leaving you with a vibrant lemon concentrate full of flavor.

To the pitcher containing your fresh lemon concentrate, add 8 cups of cold water. Stir the mixture vigorously with a large spoon, ensuring that the flavors are evenly combined. The result should be a refreshing Mint and Rosemary Lemonade with Vanilla, bursting with bright flavors and an enticing aroma.

Fill glasses with ice cubes to keep your lemonade chilled. Pour the Mint and Rosemary Lemonade with Vanilla over the ice, allowing it to cascade beautifully. For an elegant touch, garnish each glass with a sprig of fresh mint or rosemary, showcasing this delightful drink as a perfect refreshment for any occasion.