Heat a wok or fry pan until very hot, add 1 tablespoon of oil and swirl to coat the cooking surface.
Add the whisked eggs, swirl to create a thin omelette , cook for one or two minutes or until set.
Remove the omelette from the pan, set aside to cool and then slice into bite sized pieces.
Drain the noodles you were soaking
Heat the second measure of oil in the pan.
Add the grated carrot, zucchini and if you are using pork or chicken to the pan, stir fry for 2-3 minutes until tender.
Add the prawns (if using) and stir-fry for 1-2 minutes
Add the Pad Thai sauce you made earlier
Add the noodles, cooked eggs, fried tofu (if using) and half the bean sprouts. Toss until heated through.