If using fresh, pumpkin seeds, start by heating 2 tablespoons of the oil in a medium skillet over medium heat. Add the seeds and cook until you can smell their nutty aroma, 2 to 3 minutes. Set aside to cool.
In a large bowl, combine the kale, cilantro, tomatoes and onion. In a small bowl, whisk together the lemon zest, juice, vinegar, garlic and remaining 4 tablespoons of oil. Add the vinaigrette to the kale mixture and toss to combine.
Halve the avocados, pit and peel. Place 1 avocado half on each of 4 plates and top each serving with some of the kale salad. Season to fast with salt and pepper.