Prepare the Bread: Preheat the oven to 180°C (350°F). Cut the top off the bread loaf and hollow out the inside, leaving a sturdy shell.
Make the Filling: In a bowl, whisk together eggs, milk, sour cream, salt, and black pepper. Stir in chopped cherry tomatoes, mozzarella, salami, Parmesan cheese, and spring onions.
Assemble the Stuffed Bread: Spread ketchup or sauce inside the hollowed-out bread, then pour in the egg mixture.
Bake: Place in the oven and bake for 20-25 minutes, or until the filling is set and golden brown on top.
Garnish & Serve: Sprinkle with fresh parsley, slice, and serve warm.