Slice the tops off the garlic bulbs and place them on a sheet of foil. Drizzle with olive oil and sprinkle with salt.
Wrap the foil around the garlic and air fry at 375°F for 20-25 minutes until soft and golden.
In a bowl, combine softened butter, salt, red pepper flakes, garlic powder, and parsley. Squeeze the roasted garlic out of its skins and mash it into the mixture. Stir.
Spread the garlic butter generously over the baguette halves. Top with mozzarella and Parmesan cheese.
Bake at 350°F for 10 minutes, then broil for 1-2 minutes until the cheese is golden and bubbly.
Remove from the oven, sprinkle with fresh or dried parsley, and enjoy warm!