(A)nother favourite meal - (A)frican Sweet Potato Stew

I've managed to cook another "A" meal. Another favourite of ours and another vegetarian meal.It's very tasty. This one is from Good Housekeeping's "New Cooking" Recipe Book
and serves 4-6 people

African Sweet Potato and Spinach Stew

4tbsp groundnut oil (or an equivalent)
1 onion peeled & chopped
2 garlic cloves peeled & crushed
2tsp grated root ginger
1/4 tsp cayenne pepper
1 tbsp mild or medium curry paste
350g/12oz sweet potato cubed
300ml/1/2pt passata (or tin of chopped tomatoes)
300ml/1/2pt vegetable stock
225g/8oz mushrooms
225g/8oz spinach leaves
4tbsp peanut butter
2tbsp coriander

1) Heat 3tbsp oil in large saucepan, add onion,garlic, ginger & cayenne. Fry gently for 10mins. Add curry paste, cook stirring for 1 min.
2) Add sweet potatoes, stir to coat with onion mixture, fry for 3-4 mins. Add passata & stock. Bring to boil, cover, simmer for 15-20mins.
3) Meanwhile heat remaining oil in pan, add mushrooms, stir-fry for 4-5 mins until golden & beginning to release their juices.
4) Add mushrooms & spinach to potato mixture, cook for further 5 mins
5) Add peanut butter & stir to dissolve. Add coriander, season with salt & pepper& heat through
6) Serve with extra coriander scattered over top & yoghurt or soured cream if required/liked ( I don't usually bother but do serve with a naan bread)