This delightful salad offers a harmonious combination of flavors and textures. The crispness of the cucumber and celery, the subtle sweetness of the green apple, and the tangy notes from the fermented vegetables create a refreshing taste profile. The tuna adds a boost of protein and healthy omega-3 fatty acids, while the lemon juice provides a citrusy brightness. The spinach base adds a dose of leafy green goodness, contributing to the overall nutritional value of the salad.