1. Wash the old cucumber and cut it into diamond-shaped pieces. If you are careful, peel and seed it before cutting it into diamond-shaped pieces.
2. Chop onions and garlic; Heat the hot oil in a hot pot, first add the minced garlic.
3. Pour in cucumber slices and stir-fry them until they are translucent.
4. Then, add cooking wine, soy sauce, oyster sauce, chopped black pepper and white sugar and stir well.
5. Then sprinkle with chopped green onion.
6. After frying, light balsamic vinegar before cooking, stir fry again, turn off the fire, and plate.