Cut the lemon in half and remove seeds. Use a lemon reamer to juice. Strain pulp if desired into a large glass. You should get about 1/4 cup lemon juice. Crush strawberries and add juice to lemon juice. Add sweetener and stir. Add water and ice cubes. Garnish with a whole strawberry.
The serving contains about 40 calories, 1.5 g protein, 0 g fat, 10 g carbohydrates, 3.5 g fiber, and 2 mg sodium.