resztki z posiłku in English:

Our mother had no choice but to make dinner with leftovers.

Tom asked Mary to warm up some leftovers.

Those are the leftovers from lunch.

Lots of leftovers remained inside.

Since ski season is almost over, the ski wear that's on sale is all leftovers, so there's nothing that's just my size.

You had better throw away leftovers.