Place the cubed croissants into a mixing bowl and add the olive oil, grated parmesan, minced garlic, and rosemary. Sprinkle with a pinch of salt and some cracked black pepper.
Toss the croissants in the seasoning thoroughly so that the croissant pieces are thoroughly and evenly coated.
Tip the croissants onto the baking tray and bake for around 10 minutes or until golden brown and crunchy.
Allow the croissant croutons to cool before serving as a garnish or in a bowl as a snack. Store in an airtight container for 2-3 days.
Notes
This recipe works best with croissants that aren't super fresh and buttery. Stale croissants will crisp up really well, so it's a great way to use up leftovers. I like to cut up croissants with a pair of scissors; it stops you from squishing them with a knife! Always preheat the oven and use an oven thermometer to make sure you are baking at the right temperature. Be brave and let the croutons go quite a rich golden brown for optimal crunch.