Beef in black bean sauce

Bahan-bahan (4 porsi)

• 1/2 cup (75g) preserved black beans ((salted black beans, fermented black beans, Note 1))
• 400 g /14 oz beef rump steak (US: top sirloin) (, thinly sliced 3mm / 0.1" (Note 2))
• 1 brown onion (, medium size, cut into 2.5cm/1" squares)
• 1 g reen capsicum ((bell pepper), medium size, cut into 2.5cm/1" squares)
• 1 tbsp garlic (, finely minced with a knife ~ 4 cloves (Note 3))
• 1/2 cup peanut oil ((or vegetable, canola) (Note 4))
• 1 tbsp Chinese cooking wine ((shaoxing wine) (Note 5))
• 1 tbsp light soy sauce ((Note 6))
• 1 tsp dark soy sauce ((Note 6))
• 1 tbsp oyster sauce
• 2 tsp cornflour / cornstarch
• 1/4 tsp baking soda ((bi-carbonate) (Note 7))
• 1 tbsp sesame oil ((toasted ie brown, not untoasted which is yellow))
• 1 tbsp light soy sauce ((Note 6))
• 2 tsp white sugar
• 2 tbsp cornflour/cornstarch ((20g))
• 1 cup water
• White rice