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食材：
牛肉 350克
蘑菇 100克
红椒 75克
青椒 75克
姜 10克
大蒜 3 瓣
生抽 10ml
蚝油 5ml
盐 3克
玉米淀粉 10克
黑胡椒粉 2.5克
油 75ml
糖 3克
水 60ml
厨用酒 15ml
准备：
1. 把牛肉切成3mm的肉片，洗出血水，挤干水分。
2. 把牛肉放入碗中， 加入：生抽5ml，蚝油5ml，盐1.5克，油15ml，玉米淀粉5克， 黑胡椒粉1.5克拌匀后静置10分钟备用。
3. 将青椒红椒，蘑菇，姜，大蒜切好备用。
4. 准备调料汁：厨用酒15ml，玉米淀粉5克，生抽5ml，黑胡椒粉1克，糖3克，水60ml，盐1.5克
方法：
1. 开大火热锅，加油和牛肉。
2. 翻炒牛肉至八成熟出锅。
3. 洗锅，大火热锅，加油30ml，炒香姜蒜，加入青红椒和蘑菇翻炒1分钟至失去水分。
4. 加入牛肉翻炒30秒，倒入调料汁。
5. 翻炒至酱汁浓稠，出锅装盘。
注意事项：
1. 牛肉可以选择里脊，三岔，肋眼等比较嫩的部位。
2. 为了便于操作，可以将牛肉冷冻半小时待外形固定再切， 并横着纹路将肌纤维切断，便于咀嚼。
3. 腌制牛肉时加入玉米淀粉，盐，生抽，蚝油，使其更加鲜嫩，加入少量油使肉片翻炒时容易散开。
Ingredients:
beef 350g
button mushrooms 100g
red bell pepper 75g
green bell pepper 75g
ginger 10g
garlic 3 cloves
light soy sauce 2 teaspoon
oyster soy sauce 1 teaspoon
salt 3g
cornstarch 2 teaspoon
ground black pepper 1/2 teaspoon
oil 5 tablespoon
sugar 3g
water 4 tablespoon
shaoxing wine 1tablespoon
Preparation:
1. slice the beef to 3mm thick, wash off the blood and squeeze out water.
2. combine the beef with 1 teaspoon light soy sauce,1 teaspoon oyster soy sauce, 1.5g salt, 1 tablespoon oil, 1 teaspoon cornstarch and 1.5g ground black pepper, mix all of the ingredients into the beef.
marinate for 10mins
3. cut the green bell pepper, red bell pepper, button mushrooms, ginger and garlic.
4. prepare cornstarch sauce slurry, combine 1 tablespoon shaoxing wine, 1teaspoon cornstarch, 1 teaspoon light soy sauce, 1g ground black pepper, 3g sugar, 60ml water, and 1.5g salt.
Method:
1. Heat the pan over high heat, add 2 tablespoon oil and add the beef
2. Sear and stir fry the beef until it's 80% done, transfer the beef to a bowl
3. Wash the pan, heat the pan over high heat, add 2 tablespoon oil and saute the ginger and garlic, add the peppers and mushrooms and stir fry for 1 min until it's wilted
4. Add the beef and stir fry for another 30 seconds, stir up the cornstarch sauce bowl and drizzle the sauce to the pan, stir fry to combine
5. When the sauce has thickened, the dish is ready to serve
Cooking tips:
1. Most tender beef cuts such as sirloin, tri-tip, ribeye, top loin and tenderloin can be used in this dish
2. For a happier slicing experience, freeze the beef for 30mins and cut when it's partially frozen, cut the beef across the grain to shorten the muscle fibres, this makes it easier to chew through
3. When marinate the beef, add cornstarch, salt, soy sauce to make it tender; add oil to make the beef slices can be easily spread out when stir fry
