You just went around in a circle - my initial question was why pizza wasn't a real food and you turned to processed as "You can define real food as non processed food with minimal (usual one) ingredient".

What makes a real food if it's not defined by processing? Minimal ingredients list? Marshmallow is just sugar, water and gelatin. The only way you could then consider that "not real food" is by appealing to the processing of the sugar again.