In a large bowl, combine the flour, sugar, and salt.

Add the milk, 1 egg, and 1 egg yolk.

Whisk quickly until smooth and lump-free.

Beat the egg white until stiff peaks form.

Gently fold the beaten egg white into the batter.

Add enough oil to come halfway up the sides of a large frying pan.

Heat the oil to 350F (180C) over high heat.

Dip the pineapple slices into the batter, ensuring they are fully coated.

Carefully add the battered pineapple slices to the hot oil.

Deep-fry for about 3 minutes, or until golden brown on both sides.

Using a slotted spoon, transfer the fritters to paper towels to drain excess oil.

Sift confectioner's sugar on top and serve hot.