Pork vindaloo (goan cuisine)

Ingredients

• 1 kg pork
• 5 small potatoes, halved
• 4 cloves
• 4 black peppercorn
• 4 green cardamom
• 4 green chillies, slit lengthwise
• 20 red chillies
• 1 teaspoon sugar
• 2 large onions, sliced
• 4 tablespoon malt vinegar
• 2 cinnamon sticks
• 1/2 teaspoon cumin seeds
• 1 teaspoon coriander seeds
• 1 teaspoon turmeric powder
• 1 1/2 teaspoon ginger - garlic paste
• 2 tablespoon cooking oil
• Salt to taste
• 1 tablespoon vinegar