Croutons This recipe requires a 5 litre crockpot. For a smaller pot, halve the recipe but use the same slow-cooking times. Combine veggies, ham bone, water and seasonings in slow cooker. Cover and cook on HIGH for 4 hrs., then on LOW for 3-4 hrs. OR on LOW for 9-10 hrs. Remove ham bone. Prepare and add egg yolks by vigorously stirring some hot soup into the slightly beaten yolks with the sugar added. Blend into the soup and cook on HIGH until thoroughly heated (about 20 min.) Reset ot LOW until serving time. Serve with croutons.