How can I enlarge my pennis by any food or any excecise?

Penis size. Penis size is determined by genetics, not food or exercise. If you're overweight, an overhanging belly may make the penis appear smaller. In that case, weight loss could change that illusion. I also see that you've listed yourself as a female. If you're trans-gendered seeking a penis rather than clitoris, female-to-male sex change is a complex process involving a surgical procedure.