Preheat Oven to 425°F
Set your oven proof pan in the oven to heat.
In a blender combine the eggs, flour, milk, sugar, and vanilla. Blend thoroughly, then let stand for 15 minutes.
When the oven and pan are HOT, remove the pan from the oven (be careful), and set on a rack or stovetop. Put the butter in the hot pan to melt.
When it’s melted, pour the batter into the pan. Swirl to fill the pan evenly.
Put the filled pan back into the oven.
Bake 15 minutes. DON’T OPEN THE OVEN.
When the timer goes off, peek in. If it's brown and rise, remove the pan from the oven. The sides will have come up, and it will even have domed in the center. If not yet brown, let bake go another 3 minutes.
After removing. Let it sit for a minute… then fill the center with fruit and dust with powdered sugar.
Serve in the pan.
Top with whipped cream if you like.