Preheat your oven to 175°C (350°F) and lightly grease a 9x13-inch baking dish.
In a large mixing bowl, whisk together the eggs and milk until the mixture is smooth and slightly frothy.
Stir in the grated cheese, diced cooked meat, chopped vegetables, and a pinch of salt and pepper. Mix until everything is well combined.
Spread the bread cubes evenly across the bottom of the prepared baking dish.
Pour the egg mixture over the bread and ingredients, making sure to evenly distribute the liquid so all parts are soaked.
Gently press down on the layers with a spatula or spoon to help the bread soak up the eggs and ensure even baking.
Place the dish in the oven and bake for 30 to 35 minutes, or until the top is golden brown and the edges are bubbling.
Check for doneness by inserting a knife in the center—if it comes out clean and the top is crispy, it's ready.
Remove the casserole from the oven and let it rest for about 5 to 10 minutes, allowing it to set and making slicing easier.
Slice into squares, garnish with chopped herbs if desired, and serve warm for a hearty, cheesy breakfast experience.
