Preheat the oven to 350 °F.
Whisk the milk and eggs together in a large bowl, then add the bread chunks.
Mix in the cheese, and make sure all the bread is submerged so it can soak up the milk.
Heat the butter or oil into a large skillet over medium heat.
Add your alliums like garlic and onions and anything that needs a while to saute, like kale stems, and cook until softened.
Once those are tender, add any leaves or already-cooked vegetables and stir to combine and cook another 3 minutes.
Remove the veggies from heat and let cool a few minutes before adding to the bread mixture.
Add a generous pinch of salt and a few grinds of black pepper and stir to combine thoroughly.
Grease a 9 x 13 baking dish and pour in the bread and vegetable mixture evenly.
Bake until the top is puffed and golden brown, about 50 to 60 minutes.
Serve hot. Cool and refrigerate any leftovers.
