1. Preheat your oven to 350°F (175°C) and line a baking sheet with parchment paper.
2. Using a sharp knife, carefully slice the top third off each croissant and hollow out the bottom sections, keeping the removed tops aside.
3. In a mixing bowl, whisk together the eggs, milk, salt, and pepper until well combined.
4. Stir in the shredded cheese, cooked bacon or ham, and green onions.
5. Spoon the egg mixture into each hollowed croissant, filling them generously.
6. Place the croissants on the prepared baking sheet and bake in the preheated oven for 20-25 minutes, or until the egg mixture is set and the tops are golden brown.
7. Once baked, remove from the oven and allow to cool slightly before serving.

Just like I learned from my grandmother, trust your senses here. The smell of the baking croissants should be your guide, filling your kitchen with an aroma that’ll remind you that breakfast is indeed the most important meal of the day.