If using a granulated sweetener, mix ½ cup water and the sweetener in a pot and heat until the sweetener is dissolved. Then, once dissolved, add sweetener and water mix to remaining water.
Stir, add ice cubes, if desired, and enjoy.
Garnish with fresh mint, fresh strawberries, fresh pineapple, fresh lemon slices, lemon zest, or even frozen cucumbers.
Notes
The salt is optional but I recommend not skipping it. It adds that perfect extra "thing", plus it also adds beneficial minerals.
Lemon Juice: Use more or less lemon juice as you'd like, but these proportions are great in my book. 1/8 cup lemon juice is the equivalent of the juice from 1 lemon so use that approximation if you'd prefer to use fresh lemons.
Sweeteners: There are so many sweeteners you can use to make lemonade without sugar. Traditional lemonade is usually made with regular sugar, but I love using pure stevia extract because it's so easy, inexpensive, dissolves easily, and is readily available. But you can use your sweetener of choice.
A liquid sweetener (like this sugar-free simple syrup) is the next best option, since it dissolves easily. If you're not trying to eat low-carb or keto, honey is a fantastic choice and maple syrup is a fun option too.
For honey or maple syrup, you'll need to use less--read this post on baking with honey for more information.
Other low-carb sweeteners can be used to make a keto lemonade, but if they're granulated, powdering the sweeteners first is the best so they'll dissolve well and you don't end up with a big glob of sweetener at the bottom of the glass!