This is also called "Danish Pancake" and I bet that there are lots of other names for it, too. I've made it for over 30 years - I got it from a friend. This is my son's favorite breakfast!
4 eggs
3/4 teaspoon salt
2 1/2 cups milk
blend together, then add:
1 cup flour
and stir (there will be some lumps - if you use a blender, don't blend too well. The texture will be wrong.)
Put a 9x13 pan in a 425 degree oven for about 10 minutes. Take the pan out and put 4 tablespoons butter in the pan, letting the butter melt. Then add the batter.
Bake at 425 for about 25 minutes - until a knife inserted in the center comes out clean.
The pancake will rise, then fall as it cools. That's normal. Cut into squares and top with syrup and/or fruit. (Our favorite is bananas and maple syrup.)