Place pine nuts in a large food processor. Pulse until a paste forms.
Add the garlic, basil, parsley, olive oil, fine salt and pepper. Pulse until a grainy pesto is formed. Set aside.
In a small saucepan over medium heat, melt the butter and whisk with flour until a paste forms.
Whisk in heavy cream until smooth and then whisk in parmesan cheese.
Remove from the heat and stir in pesto sauce until blended.
Use over pasta, on chicken, seafood or vegetables.
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