To make the Onion Puree, bring a small pan of water to the boil and add some
chopped onions. Boil until soft, drain, and puree with a hand blender or in a
food processor.
Pour the oil into a large saucepan, bring it up to a high heat. Add the whole
mustard seeds and cook until they sizzle and crackle, then add the chopped
onions and reduce the heat to low.
You can optionally add 1 or 2 Whole Star Anise to help bring out the sweetness
of the onions and impart a subtle aniseed flavour, but remove them once the
onions are cooked. Cook the onions gently until they turn golden brown.
Make a paste of the ginger puree, garlic puree, curry powder, turmeric powder,
chilli powder with a little water. Add to the saucepan and stir in well, frying
for a couple of minutes.
Now add your 800g Diced Lean Lamb cubes, stir in well, and add freshly sliced
green chillies.
Mix the Tomato Puree and Onion Puree together with water and pour into the
saucepan. Turn up the heat until the sauce begins to simmer and leave to simmer
for 20 minutes. Stir occasionally.
Finally, sprinkle in the Garam Masala and stir in well for the final 2 minutes
of cooking. Garnish with roughly chopped fresh coriander leaves and serve.