Tender beef in minutes! The Chinese secret to softening the toughest beef

Ingredients :
500g/1 pound of beef
Add 1 teaspoon of baking soda
1 onion
1 tablespoon of butter
1/2 red pepper
1/2 green pepper
Sauce :
1 large clove of garlic or 2 small
1 teaspoon of salt, 1 teaspoon of sugar
1/2 teaspoon black pepper
1/4 teaspoon red pepper flakes
1 tablespoon balsamic vinegar
2 tablespoons of olive oil
1 tablespoon chili sauce
Ingredients :
For the Beef:
500g/1 pound of beef
1 C. teaspoon baking soda
For the Stir-Fry: