In a large mixing bowl, combine the all-purpose flour, sugar, salt, and boiling water.

In a separate cup, mix the evaporated milk with 1 tablespoon hot water.

Pour the milk mixture into the flour mixture.

Using a stand mixer, knead until just combined.

Add the egg and continue kneading for 10 minutes until smooth.

If the dough is still very sticky, add another tablespoon of flour and knead for another 2 minutes.

Rub the dough with cooking oil.

Cover with cling wrap and let it rest for 1 hour.

Divide into 6 equal portions.

Roll each into a ball.

Place each dough ball in a container and pour enough cooking oil to coat completely.

Cover again and rest for another hour.

Stretch each dough into a very thin sheet until almost transparent.

Brush generously with butter.

Place cheddar cheese slices in the center.

Fold all four sides toward the middle until the cheese is completely enclosed.

Heat a frying pan over low heat.

Add a slice of butter.

Cook the folded prata until both sides become golden brown and crispy.

Allow to cool for about 5 minutes before serving. Enjoy while hot!