Heat olive oil in a saucepan and add the tomato and the sugar. Stir the mixture using a wooden spoon and let it simmer. Add the water and the cube and let boil. Stir in order to dissolve the vegetable cube easier. When the water boils add the square noodles. Let them boil in low heat and observe regularly because more water might be needed. Serve in a place and pour over melted butter.