Peel the potatoes and cut them into pieces.

Slice the green pepper.

Cut the tomatoes into pieces.

Heat oil in a pan, add onion, ginger and garlic and stir fry.

Stir-fry the eggplant pieces in the pot for a while.

Stir-fried potatoes together

Stir-fry potatoes and eggplant until soft, then add tomato pieces and stir well.

Mix soy sauce, vinegar, sugar, salt, monosodium glutamate and appropriate amount of water, and stew in a pot for a while.

When the soup is almost the same, add the green pepper pieces and stir fry for a while.