Follow these simple steps to create your savory bread pudding:

1. Preheat the Oven: Preheat your oven to 350°F (175°C). Grease a large baking dish with cooking spray or butter.
2. Prepare the Bread: Cube the stale bread and place it in a large mixing bowl. If using fresh bread, lightly toast the cubes in the oven for a few minutes until they are slightly dry.
3. Mix Wet Ingredients: In another bowl, whisk together the milk, heavy cream, eggs, Dijon mustard, garlic powder, onion powder, dried thyme, salt, and black pepper until well combined.
4. Combine Ingredients: Pour the wet mixture over the cubed bread, ensuring all pieces are coated. Let it sit for about 10 minutes to absorb the liquid.
5. Add Fillings: Stir in the shredded cheese, cooked vegetables, and diced meat (if using). Mix gently until evenly distributed.
6. Transfer to Baking Dish: Pour the bread mixture into the prepared baking dish, spreading it out evenly.
7. Bake: Place the dish in the preheated oven and bake for 40-45 minutes, or until the top is golden brown and the center is set. A knife inserted in the center should come out clean.
8. Cool: Once baked, remove it from the oven and let it cool for about 10 minutes before serving. This allows the pudding to firm up slightly for easier slicing.
9. Garnish: Sprinkle with fresh herbs for a pop of color and added flavor just before serving.

These simple steps will guide you in creating a savory bread pudding that is sure to impress!