Can you use regular salt rather than Kosher sale in a recipe?

Answer 1

Yes. "Kosher" salt is really a misnomer. Coarse salt was used to cure and preserve certain meats, by drawing out residual blood, part of the process of "koshering" meat. So it came to be known as "kosher" salt, when if anything it should be called "koshering" salt. But because kosher salt is like lots of regular salt crystals stuck together, if the recipe calls for regular salt you need to use less kosher salt, but if the recipe calls for kosher salt you will most likely wind up needing more regular salt if you don't have kosher salt handy.