My PD included ground meat in her list of things to feed my 9-month-old. My baby looks like she wants to vomit (as if she doesn't like the taste) after a few bites though. Should I keep trying or wait until she's older?

You can try changing the cooking method for ground meat. For example, if you have been serving ground meat in porridge , perhaps you can consider frying or sauteeing the meat before adding it to the porridge. Meat usually tastes better when it's lightly browned before adding them to stews or porridge.