Preheat the oven: Begin by preheating your oven to 350°F (175°C). Prepare a baking sheet by lining it with foil to catch any drips during baking.
Prepare the filling: In a large mixing bowl, combine 1 (8 oz) package of softened chive and onion cream cheese, 1 cup of Ranch dressing, 1.5 tsp of garlic salt, and 1 tsp of onion powder. Stir until everything is well blended. Add in 3 cups of chopped cooked chicken, 6 slices of crumbled turkey bacon, 3 medium green onions (chopped), and 1 cup of shredded Colby-Jack cheese, mixing until fully combined.
Hollow out the bread: Take your 16-inch loaf of Italian bread and slice it in half lengthwise, creating two equal halves. Gently hollow out some of the interior bread from both halves to create space for the filling, ensuring you leave enough wall thickness to hold the mixture.
Assemble the stuffed bread: On one half of the hollowed bread, layer 1 cup of shredded Colby-Jack cheese. Spread the prepared filling evenly on top. Then, sprinkle the remaining 2 cups of shredded cheese on top to achieve a cheesy crust.
Cover and butter: Place the top half of the bread back in place. Brush the top of the loaf with 1 tbsp of melted butter to enhance flavor and achieve a golden-brown crust.
Bake: Wrap the entire loaf in the prepared foil and place it on the baking sheet. Bake in the preheated oven for approximately 30-40 minutes, or until the filling is heated through and the cheese is bubbly and melted.
Serve: After removing the stuffed bread from the oven, let it rest for about 5 minutes. Then, slice it into portions, serve it warm, and enjoy the ooey-gooey cheese and flavorful filling!