Heat the oil in a large wok or frying pan until hot, add the cumin seeds and stir-fry over a medium heat for 1 minute, then add the onions and stir-fry for a further 3–4 minutes until softened. Add the ginger and garlic and continue to stir-fry for 1 minute.
Add the pork and all the ground spices, season with salt and stir-fry for 8–10 minutes or until the pork is browned and cooked through. Stir in the red pepper, peas and tomatoes and stir-fry for a further 3–4 minutes or until the vegetables are tender. Remove from the heat and stir in the lime juice.
Scatter with chopped coriander and serve with a dollop of yogurt and warm parathas or chapattis, if liked.