In a large bowl, whisk together eggs and milk; stir in garlic, salt, and cheese.
Add chopped pepper, kale, and sausage to the baking dish, spreading evenly. Pour egg mixture on top, gently stirring mixture to distribute. Cover and refrigerate about 8 hours or overnight.
Preheat oven to 350 degrees.
Uncover the refrigerated casserole; bake 35 to 40 minutes or until just set and a knife inserted near center comes out clean. Let stand 10 minutes before serving. Sprinkle with fresh parsley and sliced green onions for garnish.
To make this dish the same day, adjust the bake time to 30 to 35 minutes and check for doneness.
Notes
Use your favorite sausage in this recipe. I like to use bulk sausage rather than link sausage. However, while I've not used this product, it did catch my attention. I noticed that Jimmy Dean has fully cooked Sausage Crumbles in Original and Turkey Sausage varieties, making this recipe easy to throw together in very little time.