Preheat the oven to 400° Fahrenheit (204° Celsius)
Spray the popover pan (or muffin tin) with non-stick spray or grease with shortening. This will help the popovers come out of the pan easier when they’ve finished baking.
In a medium-sized bowl, beat eggs, milk, and olive oil with a whisk or beater.
Add the flour and salt.
Beat until the mixture is blended but still a little lumpy. It should be roughly the same consistency as pancake batter.
Fill the popover or muffin cups halfway. Bake for 40 minutes or until the crusts are very firm.
Turn off the oven. Remove the popovers and prick with a fork to let out the steam.
Return popovers to the oven for an additional 5-10 minutes until desired crispiness.