Grease a 9x13 casserole pan.
Brown sausage and diced onion in a frying pan.
Place six thin slices of English Toasting Bread or a thin layer of cubed English Muffins in the bottom of the dish.
Spread sausage and onion over the top of bread. Top with shredded cheddar and mozzarella cheese.
Spread red peppers evenly over the entire dish.
Whisk eggs, milk and pepper together in a medium bowl. Pure whisked eggs over the top of the casserole.
Cover and place casserole dish in the fridge over night.
Preheat oven to 350 degrees.
Place casserole dish in oven and bake for 30 minutes or until the egg is firm and the cheese is melted to ooey-gooey perfection.
Optional: top with diced chives.