Put the pork in a bowl a large mixing bowl that will hold all the ingredients. Add fish sauce, green onion, shallot, cilantro, the rest of the lime juice, ground chili pepper and almost all of toasted rice into the bowl. Save some toasted rice to sprinkle on top for garnish. Mix well and taste. It should be a little bit hot. You should be able to taste tartness from the lime juice and the fish sauce. If you need to add more fish sauce or lime juice, don't be afraid. Getting the flavor balance right is a trial and error process.