Roast the broccolini: Preheat oven to 425ºF. Place the broccolini on a baking sheet and top with olive oil, salt, and black pepper. Use your hands to toss the broccolini until well coated, then arrange it in an even layer. Roast for about 15 minutes, flipping halfway, until the broccolini is tender and lightly charred on the ends. Let cool for 10 minutes, then chop into bite-sized pieces.
While the broccolini cools, make the dressing: To a blender or food processor, add the basil, hemp seeds, garlic clove, lemon juice, water, olive oil, distilled white vinegar, honey, salt, and pepper. Blend for about 30 seconds until completely smooth.
To a large bowl, add the spinach, chickpeas, chopped roasted broccolini, cucumber, and pumpkin seeds. Pour the dressing on top and use tongs or to toss well. Garnish with a sprinkle of hemp seeds and enjoy!