Set the oven rack to the center position, and preheat the oven to 300ºF (149ºC)
Cut the bread into thin slices, then arrange them nicely on a baking tray.
Place the tray in the oven and let the slices toast for about 20 minutes, depending on the oven. Once the bread is nicely dry and crunchy, remove it from the oven, and let it cool.
Place them in a food processor (or a powerful blender) and mix until crumbly, it should take about 2-3 minutes.
Transfer the breadcrumbs in a bowl, and add the parsley, parmesan and garlic, then season with salt and pepper to taste and mix everything together.
Transfer the homemade breadcrumbs into an airtight container to store.
