The day before, place a tray in the freezer so it's very cold when you're ready to use it.
Temper the chopped chocolate or chocolate chips using a double boiler or microwave.
Melt the chocolate until it reaches 50°C (122°F).
Remove from the heat and stir regularly until the temperature drops to 26-27°C (78-81°F).
Briefly return it to the heat to bring the temperature up to 31-32°C (88-90°F), the ideal working temperature.
Pour the tempered chocolate into a piping bag (or a freezer bag) and cut a small opening at the tip.
Quickly pipe chocolate spaghetti by moving back and forth across the cold tray.
Cut the ends to remove any thick or irregular parts.
Gather the chocolate spaghetti and wrap them around a stainless steel ring placed on a plate or platter.
Work quickly: hold the edges of the nest in place with a cup or heavy object until the chocolate completely crystallizes.
For a thicker nest, layer two or use a larger tray to create more spaghetti.
You can use these spaghetti to decorate the base of a dessert by wrapping them around it.