Heat the sunflower oil in a heavy bottomed casserole dish and add the onion
when hot. Cook for a few minutes, stirring occasionally.
Whilst the onion is cooking, peel and crush the garlic and add to the pan.
Cut the green pepper into small pieces and gently fry with the onion and garlic
for 1 minute.
Add the tinned tomatoes, with their juice.
Stir in the tomato puree, paprika, juice, salt & pepper.
Cut the mushrooms into mouth size pieces, and add.
Scrub the potatoes, peel and chop into large pieces. Add the potato to the
casserole dish, mix well, adding a little water if it is too thick. It needs to
be a fairly runny mixture at this stage as it will thicken during the cooking.
Cover the casserole and put it in the pre-heated oven. Cook for about 1 hour
until the potatoes are well done.