No "like" button on this thread, but Hans has a good method.
The auto-thrust is very good on Airbus FBW and does a fine job. 'Destabilisation' thrust during the flare only happens when pilots are late moving the thrust levers back to idle - the auto-thrust sees the reducing IAS and increases thrust to maintain it. Been there done that
So the key is to flare and move the levers back at the right point. If the flare is not quite right and you feel you might want to keep a little thrust on for a moment; you can bring the levers back part way as Hans says to limit the maximum thrust allowed while still keeping the auto-thrust engaged.
I don't know if Airbus would endorse this method but it works.