This is best done with a sandwich toaster (also known as a toastie maker).
Can be done in an oven. (no microwave)
Step 1: Ingredients
You can use milk chocolate or dark one.
Optional; add nuts or candied fruits to taste.
Step 2: Preparation
Align chocolate between slices of bread.
Put them in the toastie or in the oven.
Heat for a few minutes.
Beware the chocolate is piping hot !!!