Before making the recipe, wash and dry your mint and lemons well.
To begin, make the simple syrup. Use a vegetable peeler to peel off the rind from one lemon. Then, add the peel to a small saucepot with the 1 cup of water, 1 cup of sugar, and 1/3 cup of fresh mint.
Bring the mixture to a simmer, stirring frequently, and simmer until all of the sugar is melted. When done, let the syrup steep for around 10 minutes as it cools down.
Now, juice your lemons until you have 1 and 1/2 cups. This should be about 6-8 large lemons-worth of juice.
Using a fine mesh sieve, strain the lemon juice into a large pitcher. Then, strain the syrup into the pitcher as well, and mix.
Add in about 6 cups of water and mix the lemonade again. Taste, and adjust to your liking (i.e. add more water or lemon juice). Add ice to fill to the top.
Serve cold, and enjoy!