Youre damn lucky you got nardil if nothing has worked for you yet. Most doctors *don't* know too much about it (but should look it up)... but because of their ignorance won't prescribe it.
I recently found out that I can eat at least a slice of aged cheddar on it with no complications. I reacted badly to a fresh sausage, I think it had been thawed for too long then frozen by the company, damn cheapos.
Basically you are free to consume any meat and dairy products, yogurt should be okay as long as it is *fresh* and check the expiration date on any non-milk dairy. All fruits and vegetables are fine except certain exotic kinds of spinach and beans (I believe it is new zealand prickly spinach and fava bean pods that are culprits - two things I've never eaten anyway). Aged cheese is supposed to be avoided most stringently, however as I said I've been eating single slices of 4-cheese pizza and cheddar without any problems.
Also aged/cured meat is supposed to be verboten. I haven't tested it yet, but this includes pepperoni and genoa salami. Ham, turkey, corned beef, including their luncheon meat forms, are all fine. Also, bacon is A-Okay.
And feel free to eat small amounts of forbidden foods once you get used to the pills for a month or so. The blood pressure changes correspond to the amount of tyramine ingested. Perhaps if I ate a brick of parmesan cheese I'd be in trouble, but as it stands sprinkling it on pasta doesn't affect me.