4 teaspoons lemon zest
3 cloves garlic, minced
2 teaspoons Dijon mustard
¼ teaspoon salt
¼ teaspoon ground black pepper
½ cup olive oil
½ cup sour cream
Combine lemon juice, lemon zest, garlic, Dijon mustard, salt, and pepper in a bowl. Slowly whisk olive oil into the lemon juice mixture until thickened. Whisk sour cream into the mixture. Transfer the dressing to a sealable container. Refrigerate 15 minutes to overnight.