Although lentils do not normally need soaking, it is vital that you do put the pulses and wheat in water the day before you want to serve this easy-to-make soup.
Put the beans, lentils and wheat in a large bowl and cover with cold water. Leave to soak overnight.
The next day, drain the beans, lentils and wheat mixture, rinse under cold water and drain again. Put the mixture in a large pan. Cover with plenty of cold water and cook for about 1 ½ hours, by which time all the ingredients will be quite soft. Strain the mixture,