Place the vinegar in a jar or small mixing bowl. Season to taste with salt and pepper.
Add the raspberry jam and the honey, if using. Shake or whisk well to combine.
Add the oil and shake well.
If you like a sweeter dressing, add 1 teaspoon honey to the mixture before adding the oil.Use the vinaigrette as a salad dressing, a chicken marinade, or a sauce for cooked chicken.Variations: feel free to substitute a different jam, preserve, or marmalade in place of the raspberry jam. There are so many options to choose from, including blueberry jam, strawberry jam, blackberry jam, apricot preserves, raspberry sauce, and cranberry sauce.