Green Beans and Potatoes in Olive Oil

2 pounds fresh green beans
1 large onion, grated
4 potatoes
4 ripe tomatoes or 1 can peeled, chopped tomatoes
a little grated garlic
2 teaspoons parsley, finely chopped
salt, pepper
pinch of sugar

Clean and wash beans thoroughly. Heat the oil in a pot and saute the onion.

Add the remaining ingredients except the potatoes, along with a little water, let simmer for 20 minutes, then add the potatoes that have been cut into quarters.

If necessary add a little more water and cook until well done. Serve lukewarm.