Rinse and dry the kale, red chard, and lettuce thoroughly. Finely chop the greens, then place them in a large bowl. Drizzle with olive oil and add a pinch of salt. Gently massage the greens by hand for about a minute to soften their texture and enhance flavor.
Add in the diced celery, halved cherry tomatoes, and pistachios. Toss gently to distribute evenly throughout the salad.
To prepare the dressing, combine the avocado, water, lemon juice, garlic cloves, green onion, parsley, dill, salt, and black pepper in a blender. Blend on high speed until the mixture becomes creamy and smooth.
Pour the dressing over the salad and mix thoroughly, ensuring all the ingredients are well coated.
Finish by dusting the top with nutritional yeast before serving. Enjoy your vibrant and refreshing salad.