In a small saucepan, combine oil, sugar, and vinegar.

Heat over low heat, stirring until sugar dissolves completely.

Add pineapple juice to the saucepan.

Incorporate paprika, cayenne powder (if using), garlic powder, and salt.

Introduce ketchup and water to the sauce.

Increase heat slightly, stirring frequently, until almost boiling (2-3 minutes).

Whisk in cornstarch and flour, ensuring no clumps form.

Add diced green peppers to the sauce.

Reduce heat to low and stir occasionally.

Separately cook chicken breasts to your preference (frying recommended).

If sauce becomes too thick, add a small amount of water and stir.

Once chicken is cooked, cut into bite-sized pieces.

Add the cooked chicken to the prepared sauce.

Simmer chicken in the sauce for 4-7 minutes, allowing it to absorb flavors.

Remove from heat and serve immediately for best results.