This is comfort food. Again. What can I say? I am suffering from stress currently and food like this is the culinary equivalent of a great big hug. Patatas a lo pobre is an Andalucian dish which I learnt about in Salamanca. Yes, odd I know, but it is served as tapas all over Spain, and there was a really good Andalucian tapas bar near my flat in Salamanca. I spent ages there learning Spanish, and more importantly, learning how to cook Spanish tapas from the elderly couple who ran the place with their son and his family. Anyhow, this is best eaten outside as the evening cools, with a glass of something chilled and the birds singing. It is the reward of a hard days work. Some day, you can also try adding spicy chorizo sausage and a fried egg right at the end, and you will be in a sudden 'not quite junk food' related heaven. The thing about this dinner is that, so far, every Spaniard I have met has disagreed about exact technique and ingredients. It is definitely the sort of thing that is best done my mothers everywhere, and is only really perfect when cooked like it is done 'at home'. Good luck.
Anyhow, you need (for about 4 people)
4 large potatoes, thinly sliced (you can leave these in water for about 20 minutes to get rid of the starch, and then drain before you cook)
1 green pepper, cut into thick strips
1 onion roughly chopped
Garlic (if you like?) Up to 8 cloves.
about 1/2 a litre of olive oil (I know! It sounds like loads, but trust me)