Preheat your oven to 350 degrees.
In a sauté pan, add in 1 Tbsp olive oil. Add in diced onion, red bell pepper, spinach (or kale), and fresh mushrooms. Continue to sauté until done then set aside.
In the same pan, brown your impossible sausage until cooked through.
In a large bowl, add in sausage/veggie mixture, hash browns ,vegan cheddar sheds, onion powder, garlic powder, salt, and pepper. Stir to mix together well. Spray a 9 x 13 pan with a spritz of cooking oil and pour in your mixture.
Mix bottle of Just Egg with 1/2 cup plant-based milk and pour on top of your casserole.
Sprinkle the top with paprika and vegan cheddar shreds.
Bake for 35-40 minutes or until bubbly.
Sprinkle with fresh parsley and serve.