In large, heavy-duty food processor, process garlic and basil until coarsely chopped, about 10 seconds, stirring to scrape down side of bowl if necessary. Add pine nuts, olive oil, lemon juice, nutritional yeast, salt (starting with ½ tsp) and pepper to taste. Process for about 45 seconds, until pesto is very smooth but still has pretty flecks of basil, stopping to scrape down side of bowl as needed. Taste and adjust lemon juice and salt, if desired. If you'd like a thinner pesto, add water, 1 tbsp at a time, and process again until combined.