Preparation

• Pulse the cilantro, dill, scallions, lemon zest, 1/2 tsp. salt, and 1/4 tsp. of pepper in a food processor until finely chopped. With the motor running, pour the olive oil and lemon juice through the feed tube and pulse until the mixture has a pesto-like consistency. Transfer to a small bowl and stir in the sour cream. Refrigerate for at least 1 hour to let the flavors meld. Season to taste with more salt, pepper, or lemon juice.

Make Ahead Tips

The sauce will keep in the refrigerator for up to 2 days.