In a food processor or blender, blend garlic, lemon juice, salt and drained white beans until chunky but combined. With the motor running, drizzle ½ cup olive oil through the feed tube and process until blended, but not entirely smooth. Pulse in warm water, 1 tablespoon at a time, until the mixture is thick and scoopable but not runny. Taste and add more salt or lemon juice as needed.