If I export eggs in Poland?
I think we have egg production covered... I'm pretty sure that would be tantamount to bringing sand to the beach!
Although, for the health conscious I think, like the UK, there may be a demand for bottled, pasteurized egg whites. I used to buy them all the time in the UK from myprotein.com. Tried to get them here but they are generally only sold in bulk to large scale bakers etc. Again, Poland's domestic production could have that covered I think.
There's a steady growth of curry houses in Warsaw (not sure about the rest of Poland). If Pakistan share a similar spice palate with India, importing spices might be worth a try. Driving down wholesale prices would be welcomed by any restaurant owner, particularly if you can provide a good service. I have no experience in the realities of import/export though. It's just an idea.