Fall-apart massaman lamb shoulder

Bahan-bahan (6 porsi)

• 2 -2.25kg/ 4 - 4.5 lb lamb shoulder (, bone in, excess fat trimmed (but leave thin fat layer on (Note 1))
• 114 g / 4oz (1/2 cup) Maesri Massaman curry paste (1 can) (, or other brand (Note 2))
• 400 g / 14 oz can coconut milk (, full fat (Note 3))
• 3 cups chicken stock/broth (, low sodium)
• 1 onion (, halved then cut into 1 cm / 1/2" thick wedges)
• 2 cinnamon sticks ((or 1/2 tsp powder))
• 2 star anise ((won't ruin if you don't have this))
• 600 g / 1.2 lb small baby potatoes (, whole (don't cut cubes, Note 4))
• 2 large red chillis (, finely sliced diagonally (optional))
• 1 cup (lightly packed) coriander leaves & sprigs (cilantro) (, highly recommended)
• Jasmine rice ((basmati also excellent))