In a skillet - cook the sausage over medium heat for 4 minutes
Place sausage on plate
Add a bit of oil - add red bell peppers - cook for 5 minutes - add mushrooms - cook for 2 more minutes
Crack eggs into a large mixing bowl - whisk together - add dried mustard, red pepper flakes, pepper , and salt
Whisk in the milk
Add 1 cup of Cheese - mix
Add bread and the sausage
Finally add in the cooked mushrooms and red peppers
Once mixed place in a large casserole dish --- size will change the cooking time - I used a 8 x6 dish but it is EXTREMELY deep and it took over an hour to cook - if you use a 9x13 - it should take about 45 minutes to cook
Cover the egg mixture with the rest of the cheese
Bake uncovered till cooked ( 9x13 pan = 45 minutes)
Enjoy
Recipe by Budget Savvy Diva at https://www.budgetsavvydiva.com/2014/09/ultimate-sausage-breakfast-casserole-recipe/