Add all the ingredients into a blender and blend until well combined.
Serve immediately very cold and eat it for breakfast, dessert, or even as a snack. Customize it with your favorite ingredients, such as berries, chia seeds, or some banana. Add cashew milk, soy milk, or coconut milk for a creamier texture.
Keep the leftovers in an airtight container in the fridge for up to 72 hours.
Notes
It's best to prepare this smoothie with cold watermelon.
Feel free to omit the lime juice or replace it with lemon juice.
Mint leaves are not essential, although they will give your drink a delicious flavor.
If you want your smoothie to be sweeter, just add some dates or any other kind of sweetener.