Classic Burmese pork curry recipe

Ingredients

• 1 kg pork leg or shoulder, with some fat, diced into 2.5cm/1in cubes
• 100 ml malt vinegar
• 4 medium onions, peeled
• 1 piece of ginger (approx 2cm/0.7in), peeled
• 4 tbsp groundnut oil or other neutral-tasting oil
• 1 tbsp sugar
• 1 tbsp light soy sauce
• 1 tbsp dark soy sauce
• 1 tsp freshly ground black pepper