Best way to make porridge is to dig a deep hole in the ground in the early evening and then light a fire, throwing on some good sized logs. When there's a good blaze going, throw some soil on top, 1 to 2 inches deep to quench the flames. Then, place your porridge pot on top with a firmly fitting lid. Fill in the sides with soil and add another 3 or 4 inches of soil on top. The charcoals will smoulder slowly under the earth but, due to a lack of oxygen, it will not ignite. The porridge will cook very slowly which completely changes its texture. If you use some of the milk substitutes, such as Koko, it will give it a slight flavour of caramel. Next morning, carefully dig the pot out and enjoy.
Alternatively get a slow cooker, put the porridge in a small bowl with its own lid, inside the slow cooker bowl and cook on low overnight. More convenient but less woodsmanlike.