Makeahead Breakfast Casserole

Ingredients

• 1 sweet onion
• 1/2 bell pepper (red or orange)
• 12 -16 ounces reduced-fat pork sausage
• 6 slices French bread
• 6 eggs
• 1 (14 ounce) can evaporated milk
• about 1/4 c milk (evaporated milk plus milk should equal 2 cups)
• 1 teaspoon kosher salt
• 1/4 teaspoon fresh ground pepper
• 1/4 teaspoon baking powder
• 4 ounces cheddar cheese, shredded
• 1 (8 ounce) package sliced baby bella mixed mushrooms
• 4 green onions, chopped
• 1 ounce cheddar cheese, shredded