Set your oven's broiler to the low setting and allow it to preheat while you prepare the bread. Slice your French bread loaf in half horizontally, creating two long pieces, then cut each half vertically so you have four manageable sections. Arrange these pieces face-up on a sturdy baking sheet, ensuring they have a bit of space between them for even broiling.

Pour your melted butter into a small bowl and use a pastry brush to generously coat the cut surface of each bread slice. Don't be shy here; the butter is what creates that golden, crispy texture and carries all those wonderful flavors into every bite. Make sure you reach the edges so nothing gets dry or overlooked.

Now comes the fun part. Sprinkle the garlic powder evenly across all four bread slices, followed by the grated Parmesan-Romano blend, and finally top each piece with a generous handful of shredded mozzarella. This layering order matters because it allows the Parmesan to meld with the bread while the mozzarella creates that gorgeous bubbly top layer.

Place your baking sheet on the middle oven rack and broil on low for approximately nine minutes. Watch carefully during the last few minutes; you want the cheese to turn golden and bubbly with slightly crispy edges, but not burned. Every oven behaves differently, so trust your eyes more than the timer.

Remove the bread from the oven and immediately sprinkle the chopped fresh parsley over the hot, melted cheese. The residual heat will release the parsley's aroma, adding one final layer of flavor and making your cheesy garlic bread look as impressive as it tastes.