Preheat oven to 350 degrees F.
Coarsely chop pecans, tarragon and fresh basil in food processor. Add butter, salt and pepper and pulse quickly until mixed. Spread the nut mixture on top of the fillets and bake for 25-30 minutes.
Combine all sauce ingredients in sauce pan and bring to a boil. Puree and serve over fillets.
Combine all sauce ingredients in sauce pan and bring to a boil. Puree and serve over fillets.