Preheat oven to 450 degrees F.
Grease 12 large muffin tin cups or 12 custard cups. Break the eggs into a bowl and beat well. Add the milk, flour, and salt, and beat until just blended. Fill the muffin tin cups or custard cups 3/4 full with the batter. Place the pan on the center rack in the oven. Bake for 30 minutes without opening the oven door.
Serve the popovers hot with butter, jam, syrup, or honey.