Making salad dressing without acid or high fat or capsaicin One of my relatives has GERDs (acid reflux). I'm trying to find / make a salad dressing that avoids 


acidity  
large quantities of oil  
spiciness (i.e. anything with capsaicin or peperine)


But I'm struggling to accomplish this because I don't know what type that would be. I bought a book called Garde Manger by the Culinary Institute of America (CIA). 

For "cold emulsion sauces", they listed


temporary emulsions  (e.g. vinagrettes) 
stable emulsions (e.g. mayonnaise) 


However both of those examples involve high amounts of fat or acid. 

For "dairy-based dressings", these seemed to rely on primarily cheese and cream, both of which are high fat. 

Salsas it said tended to have fruits and/or vegetables combined with an acid (e.g. citrus juice, vinegar, or wine). Again, won't work. 

So the options left were 


coulis and purees
coating sauces: aspic 


Would either of these last two options work? It seems plausible since the book doesn't mention high fat or acidity as a requirement for them, but I wanted a second opinion since I've never made either.
Acids and spices are generally used to add flavor to the mostly flavorless salad.

To adapt recipes for your relative, you could try:


Use less sauce or dressing. Of cause the fat content of a dressing is high, but if you drizzle just a little bit over the salad, the overall fat content is much lower. Use less sauce to reduce the absolute amount of fat.
Use oils with a strong taste. You'll need much less oil and can greatly improve the taste of a salad if you use oils with a strong taste like sesame oil, walnut oil or peanut oil. 
Add herbs or spices instead of oils. That's how the capsaicin usually gets into a salad, but there are very tasty alternatives: salt, parmesan or a similar grated cheese, oregano, garlic or bears garlic, chives, basil leaves, mint leaves, cress, coriander leaves or finely chopped fennel all add taste to a boring salad without any fat. There are so many more ingredients you could use that the combinations are endless.