Heat a nonstick skillet over medium heat and add the butter; melt until bubbling.
Add the cauliflower gnocchi (frozen or thawed) in a single layer and cook undisturbed for 2–3 minutes until the bottom is golden brown.
Flip the gnocchi and cook another 2–3 minutes until golden and heated through.
Pour in the heavy cream, add the lemon zest, and season with a pinch of kosher salt and black pepper; stir to combine.
Stir in the finely grated Parmesan until melted and the sauce coats the gnocchi; taste and adjust seasoning if needed.
Transfer to plates, top with fresh herbs and extra Parmesan, and serve immediately.