Peel and finely chop onion
Peel and crush garlic
Peel and grate ginger
Wash potatoes and cut into cubes
Heat oil and add onion
Cook for 2-3mins
Stir in spices, garlic and ginger
Stir in potatoes and cook for 2-3 mins
Add tomatoes and season
Cover and cook until potatoes are tender
Cook onion, add spices, add toms, add to potatoes