1, prepare the materials: a spoon of black pepper, half of the onion, two cloves of garlic, one and a half tablespoons of ketchup, two tablespoons of oyster sauce, a small amount of cooking oil, half a spoon of cornstarch, the right amount of water.

2, the onion, garlic chopped, do not mix together.

3, the empty pot on high heat, put a small amount of oil, wait two or three seconds, turn off to the minimum fire, put the garlic, let the garlic slowly fried to soften, slightly discolored.

4, then put the onion, small amplitude constantly stir fry, fry until the onion becomes soft.

5, put oyster sauce and tomato sauce, add black pepper, a little sugar, stir fry for a few seconds, add a small amount of water, boil, add salt, cornstarch, stir evenly.