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Preheat oven to 200°C.
In a bowl beat eggs with a mixer until foamy.
Add flour,milk ans salt.Beat til smooth.With a spatula,gently add in the cheese.
Over medium-high heat,melt buter in medium-size Ingenio fry pan.
Pour egg mixture into the hot fry pan.Transfer to oven and bake for about 25 minutes until puffed and golden brown.