Oh there's SO much you can do without garlic or onions! I don't eat them either. Just curious though - how are you with garlic powder and onion powder? Personally I'm ok with them while the real thing doesn't sit well with me. If you ARE ok with them then you can usually just sub them in in most recipes.
However there's lots of other stuff you can use to give flavour to recipes - just take a stroll through your spice aisle at your grocery store Are you ok with chiles? I use chile sauce/paste/powder a lot. There's also about a million herbs - fresh or dried. And so many other spices.
There are some veggies you can use to replace onions too that might be less problematic for you, like leeks or shallots, or chives (raw) for green onions.
Anyway, hope that helps! Life without garlic and onions really ain't so bad
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Re: No garlic or onions!
Are you ok with chiles? I use chile sauce/paste/powder a lot. There's also about a million herbs - fresh or dried. And so many other spices. 
Life without garlic and onions really ain't so bad 
