Start by preheating your oven and chopping the eggplant into small cubes. Toss it with olive oil, salt, and pepper, then spread it evenly on a baking sheet. Roast until soft and golden, allowing the natural sugars to develop.
While the eggplant roasts, bring a pot of salted water to a boil and cook your pasta. Make sure to reserve some pasta water before draining, as it helps create the perfect sauce consistency. Cook until al dente for the best texture.
Place walnuts in a dry pan over medium heat and toast until fragrant. This step enhances their nutty flavor and adds depth to the sauce. Keep an eye on them to avoid burning.
In a blender, combine roasted eggplant, toasted walnuts, garlic, nutritional yeast, lemon juice, and a bit of pasta water. Blend until smooth and creamy, adjusting consistency with more water if needed.
Transfer the sauce to a pan and gently heat it. Add the cooked pasta and toss until evenly coated. Let it simmer briefly so the flavors meld together beautifully.
Taste and adjust seasoning with salt, pepper, or chili flakes. Garnish with fresh herbs and a drizzle of olive oil before serving. Serve warm for the best experience.