Potato Peelings are good for your garden and the Potato Peelings contain nitrogen, phosphorus, magnesium and potassium which is all good for the soil that you're growing your vegetables and other garden stuff in.
When you use Potato Peelings for your garden you should add the Potato Peelings to the compost first and compost the Potato Peelings before using the potato peelings in your garden.
You can also fry potato peelings and eat them as well which I do sometimes and they're good to eat.