Reorder the sentence parts to state the ideas more clearly.
Nani
ghee on
And Nani, slathering the parathas in a rich Indian butter called
ghee, was expert at handling the breads, flipping them to
perfection on both sides, all while spying on my progress.
perfection on both sides.
while she slathered
and then
a rich Indian butter
the parathas
flipped the bread
spied on my progress
called
to crisp