In a large vessel, heat up some olive oil with a little butter and throw in the garlic and onions. Keep stirring till the onions turn transparent and add the sugar. Now you can put in the Minced meat and keep cutting it while you stir to ensure the meat separates. If you have a Maggi Stock seasoning cube, then add one of that. After the meat browns, add in the mushrooms and cook it till the mushrooms soften a bit then add the chopped tomatoes and tomato paste and keep stirring till it coats the meat and mushrooms. Sprinkle some salt and pepper and let it simmer for 15 mins or until the sauce thickens. Lastly, add the chopped parsley and leave it aside to cool.