Kerala Style Nadan Pork Fry / Ularthiyathu

Ingredients:
Pork : 1 kg.
Onion : 2 nos.
Green chilies : 5 -6 nos.
Ginger : 2 inch piece
Garlic : 15 cloves
Vinegar : 2 tbsp. (1 + 1 tbsp.)
Chili Powder : 2 tsp
Turmeric Powder : 1 tsp
Black Pepper (whole) : 1 ½ tbsp
Cinnamon : 2 pieces
Cloves : 6 nos
Mustard :: ¼ tsp
Moringa Bark (Drumstick tree bark) : a small piece (optional)
Small Onions : 6 nos.
Garam Masala : ½ tsp
Pepper Powder : 1 tsp
Curry leaves : 3 sprigs
Coconut Oil : 2 tbsp