Prepare Bread: Preheat your oven to 400°F (200°C). Then, cut the French bread loaf in half, the long way. Place the bread halves, cut-side up, on your baking sheet.
Make Garlic Butter: In a small bowl, combine the softened butter, garlic powder, minced garlic, and Italian seasoning. Mix these together well until it's a smooth spread.
Assemble: Next, spread the garlic butter mixture evenly on both cut sides of the French bread. Then, sprinkle the shredded Colby Jack and mozzarella cheese all over the top.
Bake: Now, bake for 12-15 minutes. You want the butter to be melted and bubbly. And the cheese should be golden brown and fully melted. For an extra crisp top, you can broil it for the last 1-2 minutes. But watch it very carefully so it doesn't burn.
Garnish and Serve: Finally, take the bread out of the oven. Let it cool for just a minute or two. If you are using fresh parsley, sprinkle it on now. Then, slice your bread and serve it warm.
