Sauté sausage in a pan, breaking it up with a spoon, until brown and cooked through. Drain the sausage and discard the fat (not down your sink drain!).
In separate large fry pan, heat oil and sauté garlic until fragrant, add in kale and continue to sauté for about 30 seconds. Pour in ½ cup of chicken stock, cover and braise for about 5-10 minutes, until kale is tender, but still has its form. Drain off excess liquid.
Beat eggs with whisk, continue to beat while adding in milk
Grease 13x9 pan with butter and line the pan with croutons from the bag. Spread the sausage out over the croutons. On top of the sausage spread out kale. Then, sprinkle 12 ounces of the cheese. Pour the egg mixture onto of the cheese and sprinkle the remaining cheese over the egg mixture.
Bake for 30-45 minutes, until golden brown and the egg mixture is set.
Recipe by Talia Bunting at https://www.taliabunting.com/kale-and-sausage-breakfast-casserole/