Prepare beans the day before: Put beans in a bowl filled with water and cover with plastic wrap. Place in refrigerator and allow to soak overnight.Remove beans from refrigerator and drain.Put the beans, carrot, onion and garlic in steamer basket.Pour water into tank (level 3). Start the cooking process and reserve the cooking liquid.When the vegetables are cooked, put them in the blending bowl.Add the olive oil and pulse 3 times.Add some of the cooking liquid to bring the purée to the desired consistency and blend.