German Pancakes

Heat a cast-iron skillet in the oven until very hot, then add butter so it foams around the pan.

Blend eggs, milk, flour, vanilla, and salt into a smooth thin batter.

Pour the batter into the hot buttered skillet and return it to the oven immediately.

Bake until the pancake rises high at the edges and turns deep golden.

Serve at once with lemon, powdered sugar, and berries before the custardy center cools.