Sprinkle Dutch Oven With Salt. Add Beef And Onions And Cook Until Beef Is Browned. Pour Off Fat. Remove From Heat And Add Tomatoes And Liquid, Chopping Tomatoes As You Add Them. Add Tomato Paste. Add Sliced Olives. Return Mixture To Heat. Bring To A Boil And Reduce To A Simmer. Simmer For 45 To 60 Minutes, Stirring Occassionally. Add Cooked Spaghetti And Mix Well. Place All In Large Serving Bowl.