Dice the onions and carrot, saute them in the pan with oil. Add the ground mince, stir until you've crumbled it and saute.
Pour water in a pot - a little past halfway. Wait for it to come to a boil, pour in a little olive oil and 1 tbsp salt. Add the spaghetti, without breaking or folding them. Leave them to submerge in the boiling water on their own. Boil 6-8 min. according to packet directions, no more than 8 min.
Then drain the pasta and serve in deep plates. Sprinkle with the Bolognese sauce that you made and coarsely grate parmesan on top.
Serve with a glass of white or red wine!