Sherry vinegar hasn't been tested for FODMAPs yet so test your tolerance with this vinaigrette.
Low FODMAP Serving Size Info: Makes about 1 cup (240 ml); serving size 2 tablespoons
Shake the oil, vinegar and mustard together in a glass covered jar. Season with salt and pepper to taste, if desired. The vinaigrette is ready to use or may be refrigerated in a covered container for up to a week.
Bring to room temperature before using. You can warm the jar in a bowl of warm water if you are in a rush. Shake well right before using.