2 cups diced watermelon
1/2 cup fresh spinach
1/4 cup broccoli florets
1/4 cucumber, sliced
1/2 apple – peeled, cored, and diced, or more to taste
1 stalk celery, coarsely chopped
Place watermelon in a blender; mix until liquefied. Add spinach, broccoli, cucumber, apple, and celery; blend until smooth.