1 garlic clove
½ teaspoon salt
1 stick (½ cup) unsalted butter, softened
3 tablespoons chopped fresh flat-leaf parsley
2 teaspoons chopped fresh thyme
2 teaspoons grated fresh lemon zest
¼ teaspoon black pepper
Mince garlic and mash to a paste with salt using a heavy knife. Transfer to a food processor along with remaining ingredients and blend.
Roll into a 6-inch log in a sheet of plastic wrap, twisting ends closed. Chill, covered, at least 2 hours for flavors to develop. Bring to room temperature before using.