Cut the eggplant and onion into bite-sized pieces.
Sprinkle a little salt over the eggplant and let it sit for 10 minutes, then remove the moisture.
Coat the eggplant evenly with starch powder.
Pour enough cooking oil into a pan and fry the eggplant until golden brown.
Add the sauce to a pan, and when it boils, quickly toss the fried eggplant in the sauce.
Serve on a plate to finish.