In a large pot, fry meat in oil until browned. Remove from pan and fry onions until just soft. Add tomatoes and curry powder; fry for 5 minutes and stirring occasionally. Return mutton pieces to the pan.
Stir in hot stock, cover tightly and simmer gently over a low heat for 1 hour
Stir in carrots and potatoes, cover tightly again and simmer for a further 30 – 50 minutes or until meat and potatoes are tender.
Stir in the soya mince and simmer for 2 – 3 minutes to thicken the gravy.