This is such a cool refreshing drink for hot and humid summer days. I like to make it and chill it in the fridge for a couple of hours before serving. The lemon adds a citrus taste to it. Blend together 2 cups of watermelon + 1/2 cup of fresh strawberries with some cold water. Squeeze some lemon juice and add 1 tsp sugar or sugar sweetener. Garnish with some fresh mint(optional).