In a big skillet over medium warmth, cook dinner the sausage, breaking it aside because it cooks, and the onion. Drain the surplus grease, then add the kale for an additional minute or two and cook dinner till wilted. Put aside.
Whereas the sausage cooks, crack the eggs into a big bowl. Add the milk, heavy cream, 1 cup of the sharp cheddar, and the salt. Combine properly.
Grease a 9×13 glass baking dish with butter and place the sourdough cubes within the dish. Evenly distribute the sausage and onion combination over the bread cubes. Pour the egg and milk combination over all of it and blend gently.
Sprinkle the remaining 1 cup of sharp cheddar excessive, cowl tightly with aluminum foil, and put it within the fridge for 8-24 hours.
Within the morning, preheat the oven to 350 levels and take away the casserole from the fridge. Bake, coated, for 45 minutes. Take away the tinfoil and bake for an additional 15-20 minutes.
Permit it to relaxation for 10 minutes earlier than serving. Take pleasure in!
