Plum khoresh

This is my all time favourite and my mom's is the best, so why not sharing the joy. Here is the recipe, it is for 2-3 people.
Lamb(diced): 300 grams
Dried plum: 200 grams
Onion: 1 medium
Tomato puree: 1 Table spoon
Sugar:100 grams
Cinnamon:2 tea spoon
Turmeric, salt and pepper
Veg oil: 1-2 Table spoon
Water( boiled): 1 cup
Dice the onion and fry it in some veg oil, add turmeric and fry it for 30 seconds with the onion, add the lamb and let it brown. Add the tomato puree , dried plums, cinnamon, salt pepper and fry for a couple of minutes, finally add the sugar to the mixture. Add the boiled water until it covers the ingredients. Put the lid on and let the heat do its magic for around an hour until the lamb is soft and tender. Serve with fluffy rice with a glass of cold ice tea.