One of my local BIR's used to serve garlic naan's covered in "hard stringy bit's".? They (the naan's) tasted great.

When I asked the owner what's with the bit's he said that it would be garlic skin as they did not peel the garlic.

I could cope with the "little extras" but my wife couldn't, so we moved to the BIR across the road.

As for the ginger peel, I know an Indian lady who uses it along with other ingredients to brew Indian tea.
I suppose if it did contain any pesticides it might add to the flavour.? ?