Preheat oven to 375. Heavily grease about 15 med-size muffin cups w/ solid shortening. Place eggs and milk in a very large bowl and whisk until smooth, or beat with an elec beater at low speed. Gradually whisk or beat in flour until batter is smooth. Stir in green onions and salt. Fill each muffin cup half-full w/ batter. Bake in preheated oven until lightly browned, about 15 to 20 min. Popovers rise during baking but will fall after you take them from the oven. Serve immediately.