Put 1 onion, 10 g (2 cm) piece ginger and ½ green chilli into a food processor and blend to a paste. If you don't have a processor, finely chop and mash together.
Heat 2 tbsp olive oil in a large pan or wok over medium heat.
Add the onion–ginger–chilli paste to the pan and sauté for 1 minute.
Add 2 cloves crushed garlic and sauté until fragrant, about 30 seconds.
Add 500 g lamb mince to the pan. Use a wooden spoon to break up the meat and cook, stirring occasionally, until browned and no longer pink (about 5–7 minutes).
Sprinkle in 2 tsp garam masala and stir for 1–2 minutes to coat the meat and release the spice aroma.
Add 1 chopped tomato and cook for 1 minute, then stir in 2 tbsp plain yogurt until evenly combined.
Season with a pinch of salt and ½ tsp ground black pepper, add 3 tbsp water, and let the mixture simmer for 5 minutes.
Stir in 50 g green peas (fresh or frozen), reduce the heat to low, and cook uncovered for 10 minutes, until the peas are heated through and the sauce is slightly reduced.
Taste and adjust seasoning if needed, then sprinkle 1 tsp fresh coriander over the keema to garnish and serve.
Notes
Notes:
This lamb Keema can be stored in the freezer in a plastic container for up to 3 months.