[landon32]

Assuming you use water-based sauces and mostly pre-ground spices, the easiest way to fix the spice issue would be just to put all of the spicy ingredients in a separate container and let customers add those in at their discretion. For most dishes there's just a few ingredients that are really spicy, and the recipe would probably survive without them.

This way it's a continuum instead of just a binary choice.