Spaghetti Al Sugo

Ingredients:

• 1 lb spaghetti noodles cooked al dente- don't over cook noodles, taste and drain quickly.
• 1 large can of Italian plum tomatoes
  
• 1 large onion sliced thinly
• 5 T butter
• 1 t salt

Combine all ingredients in medium saucepan. Simmer uncovered for about 30-40 minutes. Serve over spaghetti noodles. Serves 4-5.