With most of the Indian dishes, we are served with something other than side dishes i.e. salads.
Since most of the users here come from different countries, I come up with stuff that is internationally known.
So, for instance, if we have a pizza, what do we call oregano, ketchup, chilli flakes, cheesy dip collectively? I don't agree that they are the side dishes. That's because side dishes are actually dishes (you can certainly order 'salads'). But here, you cannot separately order ketchup, cheese dip and the like.
Are they fillers? I'm not sure. If there's no one single word, a close one would do.