Toast the pepitas in a dry skillet over medium heat, shuffling the pan frequently, until puffed and golden, 3-5 minutes. Remove to a small bowl and toss with a little olive oil and salt to coat the seeds.
In a large bowl, combine the greens, cucumbers, tomatoes, and as much of the dressing as you like, tossing to coat the vegetables evenly. Gently toss in the toasted pepitas and avocado. Divide the salad among bowls and finish each with a good sprinkle of hempseed hearts, nutritional yeast, and a pinch or two of flaky salt and pepper. Serve right away.