1. Spiralize the zucchinis into noodles using a spiralizer.
2. In a blender, combine basil leaves, toasted pine nuts, garlic, olive oil, nutritional yeast, lemon juice, salt, and pepper. Blend until smooth to make the pesto sauce.
3. In a pan over medium heat, lightly sauté the zucchini noodles for 2-3 minutes until just tender.
4. Toss the zucchini noodles with the pesto sauce until well coated.