Preheat your oven to 240° C (475° F), get out 6-8 custard cups and grease well.
In a mixing bowl, add the eggs, milk, flour, and salt. Beat with electric mixer 1½ minutes.
Add the oil, beat for 30 seconds. Do not over beat.
Fill custard cups ½ full.
Bake for 15 minutes, then reduce the temp to 180° C (350° F), do not open the oven door yet or you may deflate the popovers. Continue baking for 25-30 minutes, or until popovers are browned and firm.
A few minutes before they are done, prick the top of each popover with fork to let steam escape.
When done, split and fill with creamed ham, chicken or seafood. Or use as other recipes direct. Enjoy.