Cook sausage, bell pepper, and onion in large skillet or Dutch oven over medium heat until sausage is cooked through.
Drain off grease.
Stir together sausage mixture, hash brown potatoes and 1 ½ cups shredded cheddar cheese.
Pour into greased baking dish.
In a mixing bowl stir Bisquick mix, pepper, milk, eggs, thyme, marjoram and parsley or any other spices/herbs you like.
Pour over top of casserole.
Bake about 45 minutes or until knife inserted in center comes out clean.
Sprinkle 1 ½ cups cheese over top of casserole and heat through an additional 5-10 minutes.
Notes
NOTE: You can easily spice this casserole up with herbs or seasonings that add more flavor or heat if you prefer.
NOTE: The original directions said to bake this casserole at 400. This seemed too hot and the casserole burned quickly. I've taken the temperature down to a more moderate 350 and bake it slightly longer to avoid burning.
NOTE: If you want a spicier casserole, use Pepper Jack cheese.