Do the hazelnuts need to be toasted and peeled first?

I didn't toast them when I made this tart and the crust was delicious. There are relatively few hazelnuts in the crust, which gets baked anyway. That said, it never hurts to toast nuts!

I hope fivanadspice answers but usually hazelnuts are peeled before used in a crust. Roasting hazelnuts with peels allows you to rub off the peel. You can buy peeled hazelnuts and then you probably wouldn't need to roast them, though roasting provides added flavor