Cook the macaroni according to the instructions on the packet.
In the meantime, dice the onion and sauté in a pan with a little olive oil until translucent. Add the cream, tomato paste and oregano and simmer for 5 minutes on low heat.
Remove from the stove and stir in the olive oil, add the sugar and season with salt and pepper.
Mix the sauce with the macaroni and place in a baking dish.
Cut the mozzarella into small cubes and spread over the pasta with the parmesan.
Bake everything in a preheated oven at 150 ° for about 15-20 minutes.