-
Preheat oven to 350°F. Grease a 9×9 baking dish with butter.
-
In a large bowl, whisk eggs, milk, mustard, garlic powder, salt, and pepper.
-
Fold in cheeses, herbs, and cubed sourdough until well-coated.
-
Pour the mixture into the baking dish and press down gently to submerge the bread.
-
Let it rest for at least 30 minutes (or overnight in the fridge).
-
Bake uncovered for 45–50 minutes until puffed and golden.
-
Cool slightly before slicing.
This is comfort food with a classy twist—make it on Sunday and thank yourself all week.