1 (1 ounce) package dry white wine
1 (1 ounce) package cordial vinegar
1/4 cup olive oil
1/2 teaspoon salt
1/4 teaspoon garlic powder
1/4 teaspoon powdered onion powder
In a large bowl, mix the wine, vinegar, olive oil, salt, garlic powder and onion powder. Cover and refrigerate overnight.