Cut bell peppers in half and place in an greased 8×8 rimmed baking dish cut side up. (If any of the bell pepper halves are leaving to the side, ball up a piece of aluminum foil and place it in the crevices to help keep them sitting up right – this will keep the egg mixture for pouring out).
Place italian sausage in a medium pan over medium heat. Break up with a wooden spoon. Once browned, add chopped mushrooms and cook until soft. Lastly, add pizza sauce, basil and a bit of salt and pepper then mix to combine.
Whisk eggs in a large bowl then pour in italian sausage mixture and whisk to combine.
Use a ladle to pour mixture into each pepper half.
Place in oven to bake for 45-50 minutes, or until egg is completely cooked through and no jiggle remains.