I bought a beautiful loaf of chocolate chip brioche and I want to toast it:
But when I toast it, the chocolate chips melt into my toaster. How can I fix this?
You could obtain 'toastie bags'. These are made for making cheese toasties in toasters, place a slice in a bag and then pop them into your toaster.
and example can be found here. But please feel free to find your own if you decide to purchase.