Mince the garlic and saute in the melted butter until slightly browned and sizzling.
Pour in the cream, Parmesan cheese and salt. Stir until smooth and slightly thickened, about 3-4 minutes.
Stir in the pesto sauce until well combined.
Remove from heat and add 1 lb. of al dente pasta. Toss the pasta in the sauce until well coated. Garnish with torn fresh basil and freshly ground black pepper, if desired.