Heat the olive oil in a wok or large, deep frying pan. Crumble the beef mince into the pan and stir-fry over a high heat for 2 minutes to break up the meat and brown it.
Add the onion, carrot, celery and garlic. Stir over a medium heat for 1 minute, then add the chopped tomatoes and the pasta. Stir well, then add the oregano and seasoning. Cook over a medium heat so that the sauce boils gently, stirring occasionally, for 15 minutes or until thick.
While the sauce is cooking, drain the Slim Pasta Spaghetti and rinse 2-3 times thoroughly under running water. Boil in water for 2-3 minutes or heat in microwave for 1 minute. Drain and turn into a warmed serving bowl.
Taste the sauce and adjust the seasoning, then pour over the hot pasta. Toss gently and serve immediately with grated Parmesan cheese.