Heat a large skillet over medium heat
Add butter and olive oil and let melt gently without browning
Add minced garlic and cook 30–45 seconds until fragrant
Pour in vegetable broth and let simmer for 2–3 minutes
Stir in heavy cream, salt, pepper, and nutmeg
Simmer gently for 4–5 minutes until slightly thickened
Lower heat and stir in Parmesan cheese
Add chopped herbs and stir until smooth
Adjust consistency with a splash of pasta water if needed
Remove from heat once silky and glossy