Slice the mushrooms and fry them in a little low calorie cooking spray. Put to one side.
Brown the meat in a saucepan. Add the crushed garlic, oregano and season to taste. Stir in the tomato puree and cook for a couple of minutes.
Cook the pasta according to the instructions. Add the mushrooms into the meat. Drain the pasta and add to the meat and mushroom sauce. Stir until the pasta is fully coated and serve. Sprinkle a little parmesan on top if you like.