Slice the chicken fillet into strips about 3/4 inch thick.
Put chicken in a bowl and squeeze some lemon juice or calamansi juice. Season with salt and pepper. Mix until well coated. Let it stand for a few minutes.
In an empty deep plate, combine flour, paprika, black pepper, cayenne pepper, bread crumbs and fine salt. Mix until well incorporated.
Separate egg whites from egg yolk. Put egg whites in a shallow bowl. Set aside the egg yolk for other dishes. Beat the egg whites until foamy or frothy.
Dip each chicken fillet in egg whites then dredge in breading mix.
Heat cooking oil in a deep pot and fry the chicken fillet in batches until golden brown. Once cooked, remove from pan and put in a colander to drain excess oil.
Do the same procedure on the rest of chicken fillet. Serve with dipping sauce such as catsup or sweet chili sauce.