Heat oil in a medium frypan. Add chopped onions and cook until tender. Add beef mince and brown. Stir in salt and turmeric. Dilute tomato paste in water and add to the beef mixture. Cook for 30 minutes over medium heat.
Cook spaghetti in a large pot of boiling salted water according to packet directions. Drain well.
Combine beef mixture and pasta in a large pot. Cover and cook over medium heat for 30 to 40 minutes.