Combine garlic, avocados, basil, parsley, heavy cream, olive oil, lemon juice, salt, and 2 tablespoons parmesan cheese in a food processor.
Pulse the mixture until it is smooth and creamy.
Cook pasta al dente according to package directions. Drain well and reserve pasta water, do not rinse.
While pasta is hot, toss with avocado sauce adding pasta water as needed to thin out the sauce.
Garnish with remaining parmesan cheese and additional herbs if desired.
