Step 1: Prepare the Buttery Garlic Paste
Preheat your oven to 375°F.
Place garlic cloves, the rosemary sprig, sea salt, and olive oil in a small ceramic baking bowl. Cover and bake until the garlic turns soft.
Once cooled, blend the softened garlic with butter, fresh parsley, basil leaves, Italian seasoning, chili flakes, ground pepper, and salt until smooth.
Chill the paste in the fridge for about 30 minutes.
Step 2: Make the Chili Basil Oil
In a bowl, combine chopped basil, minced garlic, red pepper flakes, and salt. Heat olive oil in a small saucepan and pour it over the basil mixture. Stir well and set aside.
Step 3: Assemble and Bake
Cut the bread lengthwise and lay the halves flat on parchment paper. Generously spread the buttery garlic paste across the surface of the bread.
Sprinkle Parmesan, Mozzarella, and Cheddar cheeses evenly on top. Bake in the preheated oven until the cheese layer bubbles and develops golden brown spots.
Remove from the oven, drizzle with chili basil oil, and slice into pieces to serve hot.