for cheese, i will either serve with bread (heat in oven for ard30sec for cheese to melt), or throw it into porridge. but if you serv with porridge, have to put the cheese slowly and keep stirring until the cheese fully melt if not it will become 1 whole lump.
i think it's abit diffi to serve cheese with cereal cos you cant 'heat' up cereal. and if you have not intro bread to your baby, then i think you can add into porridge. trust me, it smell and taste great! =)