I use this on spinach salad.  I also use it as a marinade the macaroni when I make a pasta salad.  It is very much like the old Milani 1890 French Dressing.

 Ingredients:

• 1 c oil
• 1/4 c vinegar
• 1/3 c ketchup
• 1/2 c sugar
• 1/2 onion, grated (or dried onions)
• dash of salt
• shake of Worcestershire Sauce

Directions:

Mix and chill.

Serves: About 2 cups

Source:   Pat Negus