My allergies prevent me from consuming yeast, alcoholic beverages and vinegar.  I often substitute lemon juice for vinegar, but this does not always work.  I'm trying to find an allergy-free recipe for homemade dijon mustard.  Any suggestions? 
More flour: Thicker, cakier  Less flour: Flatter, more custardy  More egg: Chewier  Less egg: Breadier  More milk: Flatter  Less milk: Thicker 