The problem with transient heart arrhythmias triggered by foods is they never happen when the cardiologist is looking. You might ask for a Holter monitor for a couple of days or a week to catch what's going on.
If you get the monitor, keep a journal so the heart action can be correlated with eating and activities.
On my own, I got a little wrist heart/BP monitor. When I feel the palps or tach I check to see what's going on. When my tach gets over 120 and stays there for a couple of hours despite doing Valsalva and atenolol, then it's time to go to the ER. This all goes in my journal too. It's part of how I determine my food intolerances. (I'm not really apprehensive or nutso. I have autonomic dysreflexia that needs monitoring too.)
Heart arrhythmias, especially atrial ones, are ordinarily felt in the throat. They feel like something running up and down the esophagus, or sometimes just some hiccups or a little throbbing. It's because the esophagus is right beside the heart. Food intolerances seem, at least to me, to mainly cause atrial tach. It's the big ventricular ones that feel like a one-time whack in the chest. Those happen to a lot of people, but tell your cardiologist if you have an awful lot of them because that's important!
Never ignore chest pain. Better to raise a false alarm than miss the heart attack.