Chop the vegan chicken, onion and celery so that everything is a similar size and place in a bowl.
Add the mayo, mustard, lemon juice and red wine.
Mix together.
Taste and season with salt and pepper, if necessary - it will depend on your brand of vegan mayo as to whether it's needed.
To serve, place in a bowl with a spoon as part of a buffet-style spread, pack a pot of your vegan chicken salad into your lunchbox, or spread it in brown bread for a satisfying, vegan lunch.