Prepare the beans as described abote. Cut off the stems and cut horizontally if long. Cut of vertically the sides too if there are any stiff strings.
Peel the potatoes and cut to small chunks.
Chop the tomatoes. Peel if the peel is thick.
Chop the onions and the garlic cloves.
Cooking
Heat the pot slightly and add the olive oil or oil of your choice.
Toss in the chopped onions and saute until almost caramelized.
Then add the garlic cloves and the tomatoes (or tomato paste). Cook for an additional 1-2 minutes.
Add the potatoes and the beans. Also add the spices, mix.
Add warm water to cover the bottom of the pot.
Cover lid and let simmer until potatoes are cooked. Check by poking in a knife in a piece of potato if it slides in easily it is a sign that the dish is ready.
If the potatoes are not ready and the water is finished add some more warm water.