I made some ham salad 2-3 weeks. Use mayonnaise, chopped onion, pickle relish, ground ham.  I may have added chopped green pepper, I don't remember.  However,  it seemed like it didn't agree with me.  I wondered if the chopped onions were causing me fits.

So, today I made some more ham salad, only I left the chopped onion and chopped pepper out.
So, far it seems to agree with my stomach.