Bring a large pot of water to a boil and cook the fettuccine according to package directions. Strain, reserving 1 cup of the pasta cooking water.
Add the soy milk, soy cream cheese, almonds, nutritional yeast, lemon zest, 1 teaspoon salt and 1/4 teaspoon pepper to a blender and process until smooth.
Heat the oil and garlic in a large skillet over medium heat, stirring until the garlic just starts to sizzle and softens, about 1 minute. Add the soy milk mixture and 1/2 cup of the reserved pasta water, bring to a simmer and cook until thick and creamy, about 8 minutes. Remove from the heat, add the fettuccini and parsley and toss to combine. Thin out with a little more pasta water if needed.
Divide the pasta among four bowls and sprinkle each with some nutritional yeast and a few grinds of pepper.
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