Use a spiralizer or julienne peeler to transform the zucchini into long, noodle-like strands.
Place the zucchini noodles in a large mixing bowl and set aside.
In a high-speed food processor, combine the hemp hearts, nutritional yeast, fresh basil, baby spinach, lemon juice, garlic, sea salt, and black pepper.
Pulse the mixture until a thick, uniform paste forms.
Add one tablespoon of water and pulse again, adding more water only if necessary to reach a creamy, pourable consistency.
Pour the pesto over the zucchini noodles and use tongs to gently toss the strands until they are fully and evenly coated.
Transfer the noodles to a serving bowl and garnish with raw pumpkin seeds for added texture.