Add the roasted garlic to the blender along with the olive oil, lemon juice, ½ teaspoon of salt, and a pinch of pepper. Blend, using the blender baton to push down the contents, and blend to a smooth consistency. If necessary, add a bit of water or broth to get the blender moving, but do so sparingly so the puree doesn’t become too thin. Taste and add the additional ½ teaspoon of salt, if desired.