Preheat the oven to 325 degrees F (165 degrees C). Line a rimmed baking sheet with parchment.
Heat a large skillet over medium-high heat. Cook and stir sausage in the hot skillet until browned and crumbly, 5 to 7 minutes. Drain any excess grease; set aside to cool slightly.
Using a serrated knife, trim off the top layer of bread to expose the inside. Create a well for the fillings by removing most of the bread on the inside. Place 3/4 cup cheese along the bottom of the bread; place bread on the prepared baking sheet.
Whisk eggs, cream, salt, and pepper together in a large bowl until well blended. Stir in cooked sausage, bell pepper, green onions, and remaining cheese; pour mixture into prepared bread loaf.
Bake in the preheated oven until eggs are set, 35 to 40 minutes. Let stand 5 minutes before slicing and serving.